All-Russian test work in physics. VLOOKUP in physics: we analyze assignments with a teacher

Authors: Lebedeva Alevtina Sergeevna, Physics teacher, work experience 27 years. Certificate of honor of the Ministry of Education of the Moscow Region (2013), Letter of Gratitude from the Head of the Resurrection Municipal District (2015), Certificate of honor of the President of the Association of Teachers of Mathematics and Physics of the Moscow Region (2015).

Preparation for the exam and exam

Secondary general education

Line of UMK N. S. Purysheva. Physics (10-11) (BU)

UMK line G. Ya. Myakisheva, M.A. Petrova. Physics (10-11) (B)

UMK line G. Ya. Myakishev. Physics (10-11) (D)

All-Russian test work includes 18 tasks. Physics work takes 1 hour 30 minutes (90 minutes) to complete. When completing assignments, it is allowed to use a calculator. The work includes groups of tasks that test skills, which are an integral part of the requirements for the level of training of graduates. When developing the content of the verification work, the need to assess the assimilation of content elements from all sections of the basic level physics course is taken into account: mechanics, molecular physics, electrodynamics, quantum physics and elements of astrophysics. The table shows the distribution of assignments by sections of the course. Some of the tasks in the work are complex and include content elements from different sections, tasks 15-18 are based on textual information, which can also relate to several sections of the physics course. Table 1 shows the distribution of tasks for the main substantive sections of the physics course.

Table 1. Distribution of tasks for the main substantive sections of the physics course

VPR is developed based on the need to check the requirements for the level of training of graduates. Table 2 shows the distribution of tasks by basic skills and methods of action.

Table 2. Distribution of tasks by type of skills and methods of action

Basic skills and methods of action	Number of tasks
Know / understand the meaning of physical concepts, quantities, laws. Describe and explain physical phenomena and properties of bodies
Explain the structure and principle of operation of technical objects, give examples of the practical use of physical knowledge
Distinguish hypotheses from scientific theories, draw conclusions based on experimental data, conduct experiments to study the studied phenomena and processes
To perceive and, on the basis of the knowledge gained, independently evaluate the information contained in the media, the Internet, popular science articles

Grading system for individual assignments and work as a whole

Tasks 2, 4–7, 9–11, 13–17 are considered completed if the answer written by the student matches the correct answer. The performance of each of tasks 4–7, 9–11, 14, 16 and 17 is estimated at 1 point. The performance of each of tasks 2, 13 and 15 is estimated with 2 points, if both elements of the answer are indicated correctly; 1 point if there is a mistake in indicating one of the given answer options. The performance of each of the tasks with a detailed answer 1, 3, 8, 12 and 18 is assessed taking into account the correctness and completeness of the answer. For each task with a detailed answer, instructions are provided, which indicate what each point is for - from zero to the maximum point.

Exercise 1

Read the list of concepts that you met in the physics course: Convection, Celsius, Ohm, Photoelectric effect, Light dispersion, centimeter

Divide these concepts into two groups according to your chosen criterion. Write down the name of each group and the concepts in that group in the table.

Concept group name	List of concepts

Decision

In the task, it is required to divide the concepts into two groups according to the selected criterion, write down the name of each group and the concepts included in this group in the table.

To be able to choose from the proposed phenomena only physical ones. Remember the list of physical quantities and their units of measurement.

The body moves along the axis OH... The figure shows a graph of the dependence of the projection of the body speed on the axis OH from time t.

Using the picture, select from the proposed list two

At a moment in time t 1 body was at rest.
t 2 < t < t 3 the body moved evenly
Over the interval of time t 3 < t < t 5, the body coordinate did not change.
At a moment in time t t 2
At a moment in time t 4 the body's acceleration modulus is less than at the moment of time t 1

Decision

When performing this task, it is important to correctly read the graph of the dependence of the projection of speed on time. Determine the nature of body movement in individual areas. Establish where the body rested or moved evenly. Select the area where the body's speed has changed. It is reasonable to exclude from the proposed statements those that do not fit. As a result, we dwell on the correct statements. it Statement 1: At a moment in time t 1 the body was at rest, so the projection of the velocity is 0. Statement 4: At a moment in time t 5 the coordinate of the body was greater than at the moment in time t 2 when v x= 0. The projection of the body's velocity was greater in value. Writing down the equation of the dependence of the coordinates of the body on time, we see that x(t) = v x t + x 0 , x 0 is the starting coordinate of the body.

Difficult questions of the exam in physics: Methodology for solving problems in mechanical and electromagnetic vibrations

The body floats from the bottom of a glass of water (see figure). Draw in this figure the forces acting on the body and the direction of its acceleration.

Decision

We carefully read the assignment. Pay attention to what happens to the cork in the glass. The cork pops up from the bottom of a glass of water, and with acceleration. We indicate the forces acting on the plug. This is the force of gravity t, acting from the side of the Earth, the force of Archimedes but, acting from the side of the liquid, and the drag force of the liquid c. It is important to understand that the sum of the moduli of the vectors of gravity and the drag force of the fluid is less than the modulus of the Archimedean force. This means that the resulting force is directed upward, according to Newton's second law, the acceleration vector has the same direction. The acceleration vector is directed in the direction of the Archimedes force but

Assignment 4

Read the text and insert the missing words: decreases; increases; does not change. Words in the text can be repeated.

The skater, standing on the ice, catches a bouquet that flew up to him horizontally. As a result, the speed of the bouquet is _______________, the speed of the skater is ________________, the impulse of the body system of the skater is the bouquet of ___________.

Decision

In the task, you need to remember the concept of the momentum of a body and the law of conservation of momentum. Before the interaction, the skater's momentum was zero, so he was at rest relative to the Earth. The impulse of the bouquet is maximum. After the interaction, the skater and the bouquet begin to move together with the same speed. Therefore, the speed of the bouquet decreases, skater speed increases... In general, the impulse of the skater-bouquet system is does not change.

Methodological assistance to a physics teacher

The four metal bars were laid close to each other, as shown in the figure. Arrows indicate the direction of heat transfer from bar to bar. The temperature of the bars at the moment is 100 ° C, 80 ° C, 60 ° C, 40 ° C. The bar has a temperature of 60 ° C.

Decision

The change in internal energy and its transfer from one body to another occurs in the process of interaction of bodies. In our case, the change in internal energy occurs due to the collision of chaotically moving molecules of contacting bodies. Heat transfer between bars occurs from bodies with higher internal energy, to bars with less internal energy. The process continues until they reach thermal equilibrium.

Bar B has a temperature of 60 ° C.

The figure shows PV-diagram of processes in an ideal gas. The gas mass is constant. Which area corresponds to Isochoric heating.

Decision

In order to correctly select the section of the graph corresponding to isochoric heating, it is necessary to recall isoprocesses. The task is simplified by the fact that the graphs are given in axes PV... Isochoric heating, a process when the volume of an ideal gas does not change, and pressure increases with increasing temperature. Recall - this is Charles's law. Therefore, this is the site OA... We exclude the site OS, where the volume also does not change, but the pressure decreases, which corresponds to the cooling of the gas.

Metal ball 1, fixed on a long insulating handle and charged + q, bring alternately into contact with two of the same balls 2 and 3, located on insulating supports and having, respectively, charges - q and + q.

What charge will remain on the ball number 3.

Decision

After the interaction of the first ball with the second ball of the same size, the charge of these balls will become equal to zero. Since these charges are the same in modulus. After the contact of the ball of the first with the third, a redistribution of the charge will occur. The charge will be divided equally. Will be on q/ 2 on each.

Answer: q/2.

Assignment 8

Determine how much heat will be released in the heating coil in 10 minutes, with an electric current of 2 A. Resistance of the coil is 15 Ohm.

Decision

The first step is to convert the units of measurement to the SI system. Time t= 600 s, Further, we note that when the current passes I = 2 A spiral with resistance R= 15 Ohm, the amount of heat is released during 600 s Q = I 2 Rt(Joule-Lenz law). Let's substitute numerical values into the formula: Q= (2 A) 2 15 Ohm 600 s = 36000 J

Answer: 36000 J.

Assignment 9

Arrange the types of electromagnetic waves emitted by the Sun in decreasing order of their wavelengths. X-ray radiation, infrared radiation, ultraviolet radiation

Decision

Familiarity with the scale of electromagnetic waves suggests that the graduate must clearly understand in what sequence the electromagnetic radiation is located. Know the relationship of wavelength to radiation frequency

Where v- radiation frequency, c- the speed of propagation of electromagnetic radiation. Remember that the speed of propagation of electromagnetic waves in a vacuum is the same and equal to 300,000 km / s. The scale begins with long waves of a lower frequency, this is infrared radiation, the next radiation with a higher frequency, respectively, is ultraviolet radiation and the higher frequency of the proposed ones is X-ray radiation. Realizing that the frequency increases and the wavelength decreases, we write in the required sequence.

Answer: Infrared radiation, ultraviolet radiation, X-ray radiation.

Using the fragment of the Periodic Table of Chemical Elements, shown in the figure, determine the isotope of which element is formed as a result of the electronic beta decay of bismuth

Decision

β - decay in an atomic nucleus occurs as a result of the conversion of a neutron into a proton with the emission of an electron. As a result of this decay, the number of protons in the nucleus increases by one, and the electric charge increases by one, while the mass number of the nucleus remains unchanged. Thus, the transformation reaction of the element is as follows:

in general. For our case, we have:

Charge number 84 corresponds to polonium.

Answer: As a result of the electronic beta decay of bismuth, polonium is formed.

Improvement of the methods of teaching physics in Russia: from the 18th to the 21st centuries

Assignment 11

A) The scale division and measurement limit of the device are equal, respectively:

50 A, 2A;
2mA, 50mA;
10 A, 50 A;
50 mA, 10 mA.

B) Record the result of the electrical voltage, taking into account that the measurement error is half the division value.

(2.4 ± 0.1) V
(2.8 ± 0.1) V
(4.4 ± 0.2) V
(4.8 ± 0.2) V

Decision

The task tests the ability to record the readings of measuring instruments, taking into account a given measurement error and the ability to correctly use any measuring instrument (beaker, thermometer, dynamometer, voltmeter, ammeter) in everyday life. In addition, it focuses on recording the result, taking into account significant figures. We determine the name of the device. This is a milliammeter. A device for measuring current strength. The units are mA. The measuring range is the maximum scale value, 50 mA. Graduation 2 mA.

Answer: 2mA, 50mA.

If it is required to record the readings of the measuring device according to the figure, taking into account the error, then the execution algorithm is as follows:

We determine that the measuring device is a voltmeter. The voltmeter has two measuring scales. We pay attention to which pair of terminals is used by the device, and therefore we work on the upper scale. Measurement limit - 6 V; Value of division from = 0.2 V; the measurement error according to the condition of the problem is equal to half the division value. ∆ U= 0.1 V.

Readings of the measuring device, taking into account the error: (4.8 ± 0.1) V.

Paper;
Laser pointer;
Protractor;

In response:

Describe the procedure for conducting the study.

Decision

You need to investigate how the angle of refraction of light changes depending on the substance in which the phenomenon of refraction of light is observed. The following equipment is available (see picture):

Paper;
Laser pointer;
Semicircular plates made of glass, polystyrene and rock crystal;
Protractor;

In response:

Describe the experimental setup.
Describe the procedure

The experiment uses the installation shown in the figure. The angle of incidence and angle of refraction are measured with a protractor. It is necessary to carry out two or three experiments in which the beam of a laser pointer is directed at plates made of different materials: glass, polystyrene, rock crystal. The angle of incidence of the beam on the flat face of the plate is left unchanged, and the angle of refraction is measured. The obtained values of the angles of refraction are compared.

VLOOKUP in questions and answers

Assignment 13

Establish a correspondence between examples of the manifestation of physical phenomena and physical phenomena. For each example from the first column, pick the appropriate name for the physical phenomenon from the second column.

Write down the selected numbers in the table under the corresponding letters.

Answer:
Answer:

Decision

Let's establish a correspondence between examples of manifestation of physical phenomena and physical phenomena. For each example from the first column, we select the corresponding names of the physical phenomenon from the second column.

Under the action of the electric field of a charged ebony stick, the needle of an uncharged electrometer deflects when the stick is brought to it. Due to the electrification of the conductor through the influence. The magnetization of a substance in a magnetic field occurs when iron filings are attracted to a piece of magnetic ore.

Answer:
Answer:

Read the text and complete tasks 14 and 15

Electrostatic precipitators

At industrial enterprises, electric gas cleaning from solid impurities is widely used. The action of the electrostatic precipitator is based on the use of a corona discharge. You can do the following experiment: a vessel filled with smoke suddenly becomes transparent if sharp metal electrodes, oppositely charged from an electric machine, are introduced into it.

The figure shows a diagram of a simplest electrostatic precipitator: inside a glass tube there are two electrodes (a metal cylinder and a thin metal wire stretched along its axis). The electrodes are connected to an electrical machine. If you blow a stream of smoke or dust through the tube and start the machine, then at a certain voltage sufficient to ignite a corona discharge, the outgoing air stream becomes clean and transparent.

This is explained by the fact that when a corona discharge is ignited, the air inside the tube is highly ionized. Gas ions adhere to dust particles and thus charge them. Charged particles under the action of an electric field move to the electrodes and settle on them

Task 14

What process is observed in a gas in a strong electric field?

Decision

We carefully read the proposed text. We select the processes that are described in the condition. This is a corona discharge inside a glass tube. The air is ionizing. Gas ions adhere to dust particles and thus charge them. Charged particles under the action of an electric field move to the electrodes and settle on them.

Answer: Corona discharge, ionization.

Task 15

Choose from the list provided two correct statements. Indicate their numbers.

A spark discharge occurs between the two electrodes of the filter.
Silk thread can be used as a fine wire in the filter.
According to the connection of the electrodes shown in the figure, negatively charged particles will settle on the walls of the cylinder.
At low voltages, air purification in the electrostatic precipitator will be slow.
A corona discharge can be observed at the tip of a conductor placed in a strong electric field.

Decision

For the answer, we will use the text about electrostatic precipitators. We exclude incorrect statements from the proposed list using the description of electrical air purification. We look at the figure and pay attention to the connection of the electrodes. The filament is connected to the negative pole, the cylinder wall to the positive pole of the source. The charged particles will settle on the cylinder walls. True statement 3. Corona discharge can be observed at the tip of a conductor placed in a strong electric field.

Read the text and complete Assignments 16-18

When exploring great depths, such underwater vehicles as bathyscaphes and bathyspheres are used. The Bathysphere is a deep-sea apparatus in the shape of a ball, which is lowered into the water from the side of the ship on a steel cable.

Several prototypes of modern bathyspheres appeared in Europe in the 16th – 19th centuries. One of them is a diving bell, the design of which was proposed in 1716 by the English astronomer Edmond Halley (see figure). A wooden bell, open at the base, housed up to five people, partially submerged in water. They received air from two barrels alternately lowered from the surface, from where air entered the bell through a leather sleeve. Wearing a leather helmet, the diver could conduct observations outside the bell, receiving air from it through an additional hose. The exhaust air was discharged through a tap located at the top of the bell.

The main disadvantage of the Halley bell is that it cannot be used at great depths. As the bell sinks, the density of the air in it increases so much that it becomes impossible for them to breathe. Moreover, during a long stay of a diver in a zone of increased pressure, the blood and body tissues are saturated with air gases, mainly nitrogen, which can lead to the so-called decompression sickness when a diver ascends from a depth to the surface of the water.

Prevention of decompression sickness requires adherence to working hours and proper organization of decompression (exit from the high pressure zone).

The divers' stay at depth is regulated by special safety rules for diving operations (see table).

Task 16

How does the air pressure change as the bell sinks?

Task 17

How does the diver's allowable operating time change with increasing diving depth?

Task 16-17. Decision

We read the text carefully and examined the drawing of a diving bell, the design of which was proposed by the English astronomer E. Galley. We got acquainted with the table in which the time of divers' stay at depth is regulated by special safety rules for diving operations.

Pressure (in addition to atmospheric), atm.	Permissible time spent in the work area

The table shows that the greater the pressure (the greater the immersion depth), the shorter the time a diver can be on it.

Task 16. Answer: Air pressure increases

Task 17. Answer: Allowable running time decreases

Task 18

Is it permissible for a diver to work at a depth of 30 m for 2.5 hours? Explain the answer.

Decision

A diver's work at a depth of 30 meters for 2.5 hours is permissible. Since at a depth of 30 meters, the hydrostatic pressure is approximately 3 · 10 5 Pa or 3 atm of atmosphere) in addition to the atmospheric pressure. The allowable time for a diver to stay at this pressure is 2 hours 48 minutes, which is more than the required 2.5 hours.

In 2017, the all-Russian verification works of VLF were tested in 11 classes in physics.

VLOOKUP is the usual tests in various subjects, but carried out according to uniform tasks and assessed according to uniform criteria developed for the whole country.

To understand how to perform the verification work, you should first of all familiarize yourself with the demo versions of the control measuring materials (CMM) VLOOKUP for the subjects of this year.

Official site of VPR (StatGrad)- vpr.statgrad.org

Demo version of VPR grade 11 in physics 2017

Demonstration options in physics for grade 11 will help you get an idea of the structure of future CMMs, the number of tasks, their form and level of complexity. In addition, the demo contains criteria for evaluating the performance of tasks with a detailed answer, which give an idea of the requirements for completeness and correctness of recording the answer.

This information is useful, they can be used in drawing up a plan for reviewing material before testing in physics.

VLOOKUP 2017 options in physics grade 11

Option 9	answers + criteria
Option 10	answers + criteria
Option 11	answers + evaluation criteria
Option 12	answers + evaluation criteria
Option 13	download
Option 14	download
Option 19	*
Option 20	*

* Options 19, 20 can be used for home preparation, since we have not yet been able to find the answers on the Internet.

Testing work includes 18 tasks. Physics work takes 1 hour 30 minutes (90 minutes) to complete.

Fill out the answers in the text of the work according to the instructions for the tasks. If you write down an incorrect answer, cross it out and write a new one next to it.

When performing work, it is allowed to use a calculator.

When completing assignments, you can use a draft. Draft entries will not be reviewed or graded.

We advise you to complete the tasks in the order in which they are given. To save time, skip a task that cannot be completed right away and move on to the next. If, after completing all the work, you have time left, you can return to the missed tasks.

The points you received for the completed tasks are summed up. Try to complete as many tasks as possible and score the most points.

Preparation for the exam and exam

Secondary general education

Line of UMK N. S. Purysheva. Physics (10-11) (BU)

UMK line G. Ya. Myakisheva, M.A. Petrova. Physics (10-11) (B)

UMK line G. Ya. Myakishev. Physics (10-11) (D)

Table 1. Distribution of tasks for the main substantive sections of the physics course

VPR is developed based on the need to check the requirements for the level of training of graduates. Table 2 shows the distribution of tasks by basic skills and methods of action.

Table 2. Distribution of tasks by type of skills and methods of action

Basic skills and methods of action	Number of tasks
Know / understand the meaning of physical concepts, quantities, laws. Describe and explain physical phenomena and properties of bodies
Explain the structure and principle of operation of technical objects, give examples of the practical use of physical knowledge
Distinguish hypotheses from scientific theories, draw conclusions based on experimental data, conduct experiments to study the studied phenomena and processes
To perceive and, on the basis of the knowledge gained, independently evaluate the information contained in the media, the Internet, popular science articles

Grading system for individual assignments and work as a whole

Exercise 1

Read the list of concepts that you met in the physics course: Convection, Celsius, Ohm, Photoelectric effect, Light dispersion, centimeter

Divide these concepts into two groups according to your chosen criterion. Write down the name of each group and the concepts in that group in the table.

Concept group name	List of concepts

Decision

In the task, it is required to divide the concepts into two groups according to the selected criterion, write down the name of each group and the concepts included in this group in the table.

To be able to choose from the proposed phenomena only physical ones. Remember the list of physical quantities and their units of measurement.

The body moves along the axis OH... The figure shows a graph of the dependence of the projection of the body speed on the axis OH from time t.

Using the picture, select from the proposed list two

At a moment in time t 1 body was at rest.
t 2 < t < t 3 the body moved evenly
Over the interval of time t 3 < t < t 5, the body coordinate did not change.
At a moment in time t t 2
At a moment in time t 4 the body's acceleration modulus is less than at the moment of time t 1

Decision

Difficult questions of the exam in physics: Methodology for solving problems in mechanical and electromagnetic vibrations

The body floats from the bottom of a glass of water (see figure). Draw in this figure the forces acting on the body and the direction of its acceleration.

Decision

Assignment 4

Read the text and insert the missing words: decreases; increases; does not change. Words in the text can be repeated.

Decision

Methodological assistance to a physics teacher

Decision

Bar B has a temperature of 60 ° C.

The figure shows PV-diagram of processes in an ideal gas. The gas mass is constant. Which area corresponds to Isochoric heating.

Decision

What charge will remain on the ball number 3.

Decision

Answer: q/2.

Assignment 8

Determine how much heat will be released in the heating coil in 10 minutes, with an electric current of 2 A. Resistance of the coil is 15 Ohm.

Decision

Answer: 36000 J.

Assignment 9

Arrange the types of electromagnetic waves emitted by the Sun in decreasing order of their wavelengths. X-ray radiation, infrared radiation, ultraviolet radiation

Decision

Answer: Infrared radiation, ultraviolet radiation, X-ray radiation.

Using the fragment of the Periodic Table of Chemical Elements, shown in the figure, determine the isotope of which element is formed as a result of the electronic beta decay of bismuth

Decision

in general. For our case, we have:

Charge number 84 corresponds to polonium.

Answer: As a result of the electronic beta decay of bismuth, polonium is formed.

Improvement of the methods of teaching physics in Russia: from the 18th to the 21st centuries

Assignment 11

A) The scale division and measurement limit of the device are equal, respectively:

50 A, 2A;
2mA, 50mA;
10 A, 50 A;
50 mA, 10 mA.

B) Record the result of the electrical voltage, taking into account that the measurement error is half the division value.

(2.4 ± 0.1) V
(2.8 ± 0.1) V
(4.4 ± 0.2) V
(4.8 ± 0.2) V

Decision

Answer: 2mA, 50mA.

If it is required to record the readings of the measuring device according to the figure, taking into account the error, then the execution algorithm is as follows:

Readings of the measuring device, taking into account the error: (4.8 ± 0.1) V.

Paper;
Laser pointer;
Protractor;

In response:

Describe the procedure for conducting the study.

Decision

Paper;
Laser pointer;
Semicircular plates made of glass, polystyrene and rock crystal;
Protractor;

In response:

Describe the experimental setup.
Describe the procedure

VLOOKUP in questions and answers

Assignment 13

Write down the selected numbers in the table under the corresponding letters.

Answer:
Answer:

Decision

Answer:
Answer:

Read the text and complete tasks 14 and 15

Electrostatic precipitators

At industrial enterprises, electric gas cleaning from solid impurities is widely used. The action of the electrostatic precipitator is based on the use of a corona discharge. You can do the following experiment: a vessel filled with smoke suddenly becomes transparent if sharp metal electrodes, oppositely charged from an electric machine, are introduced into it.

The figure shows a diagram of a simplest electrostatic precipitator: inside a glass tube there are two electrodes (a metal cylinder and a thin metal wire stretched along its axis). The electrodes are connected to an electrical machine. If you blow a stream of smoke or dust through the tube and start the machine, then at a certain voltage sufficient to ignite a corona discharge, the outgoing air stream becomes clean and transparent.

This is explained by the fact that when a corona discharge is ignited, the air inside the tube is highly ionized. Gas ions adhere to dust particles and thus charge them. Charged particles under the action of an electric field move to the electrodes and settle on them

Task 14

What process is observed in a gas in a strong electric field?

Decision

Answer: Corona discharge, ionization.

Task 15

Choose from the list provided two correct statements. Indicate their numbers.

A spark discharge occurs between the two electrodes of the filter.
Silk thread can be used as a fine wire in the filter.
According to the connection of the electrodes shown in the figure, negatively charged particles will settle on the walls of the cylinder.
At low voltages, air purification in the electrostatic precipitator will be slow.
A corona discharge can be observed at the tip of a conductor placed in a strong electric field.

Decision

Read the text and complete Assignments 16-18

When exploring great depths, such underwater vehicles as bathyscaphes and bathyspheres are used. The Bathysphere is a deep-sea apparatus in the shape of a ball, which is lowered into the water from the side of the ship on a steel cable.

Several prototypes of modern bathyspheres appeared in Europe in the 16th – 19th centuries. One of them is a diving bell, the design of which was proposed in 1716 by the English astronomer Edmond Halley (see figure). A wooden bell, open at the base, housed up to five people, partially submerged in water. They received air from two barrels alternately lowered from the surface, from where air entered the bell through a leather sleeve. Wearing a leather helmet, the diver could conduct observations outside the bell, receiving air from it through an additional hose. The exhaust air was discharged through a tap located at the top of the bell.

The main disadvantage of the Halley bell is that it cannot be used at great depths. As the bell sinks, the density of the air in it increases so much that it becomes impossible for them to breathe. Moreover, during a long stay of a diver in a zone of increased pressure, the blood and body tissues are saturated with air gases, mainly nitrogen, which can lead to the so-called decompression sickness when a diver ascends from a depth to the surface of the water.

Prevention of decompression sickness requires adherence to working hours and proper organization of decompression (exit from the high pressure zone).

The divers' stay at depth is regulated by special safety rules for diving operations (see table).

Task 16

How does the air pressure change as the bell sinks?

Task 17

How does the diver's allowable operating time change with increasing diving depth?

Task 16-17. Decision

Pressure (in addition to atmospheric), atm.	Permissible time spent in the work area

The table shows that the greater the pressure (the greater the immersion depth), the shorter the time a diver can be on it.

Task 16. Answer: Air pressure increases

Task 17. Answer: Allowable running time decreases

Task 18

Is it permissible for a diver to work at a depth of 30 m for 2.5 hours? Explain the answer.

Decision

To prepare for VLOOKUP 2019, the 2018 options are suitable.

VLOOKUP in physics grade 11 options with answers 2018

This test is optional and is carried out in 2018 by the decision of the school.

Testing work in physics includes 18 tasks, it takes 1 hour 30 minutes (90 minutes) to complete it. Participants in VLOOKUP in physics are allowed to use a calculator.

The work checks the assimilation of all sections of the basic level physics course: mechanics, molecular physics, electrodynamics, quantum physics and elements of astrophysics.

While completing VLOOKUP assignments, eleventh graders must demonstrate an understanding of the basic concepts, phenomena, quantities and laws studied in the physics course, the ability to apply the knowledge gained to describe the structure and principles of operation of various technical objects or to recognize the studied phenomena and processes in the surrounding world. Also, within the framework of VLOOKUP, the ability to work with textual information of physical content is tested.

Here the following skills are tested: to group the learned concepts; find definitions of physical quantities or concepts; recognize a physical phenomenon by its description and highlight essential properties in the description of a physical phenomenon; analyze the change in physical quantities in various processes; work with physical models; use physical laws to explain phenomena and processes; build graphs of dependence of physical quantities, characterizing the process according to its description, and apply laws and formulas for calculating quantities.

At the beginning of the work, nine tasks are proposed that test the graduates' understanding of the basic concepts, phenomena, quantities and laws studied in the physics course.

The next group of three tasks tests the graduates' development of methodological skills. The first task is built on the basis of a photograph of a measuring device and evaluates the reading taking into account a given measurement error. The second task tests the ability to analyze experimental data presented in the form of graphs or tables. In the third task from this group, it is proposed to independently plan a simple study and describe its implementation based on a given hypothesis.

Further, a group of three tasks is proposed that test the ability to apply the knowledge gained to describe the device and principles of operation of various technical objects. The first task invites graduates to determine the physical phenomenon that underlies the principle of operation of the specified device (or technical object).

This is followed by two contextual tasks. They offer a description of a device or a fragment from the instructions for using the device. Based on the available information, graduates need to identify the phenomenon (process) underlying the operation of the device and demonstrate an understanding of the main characteristics of the device or the rules for its safe use.

The last group of three tasks tests the ability to work with textual information of physical content. As a rule, the proposed texts contain various types of graphic information (tables, schematic drawings, graphs). Tasks in the group are built on the basis of testing various skills in working with the text: from questions on the selection and understanding of information presented in the text in an explicit form, to tasks on the use of information from the text and existing knowledge.

The All-Russian VLF test work in physics was written on April 10, 2018 by students of 11 grades of Russian schools.

This test is optional and is carried out in 2018 by the decision of the school. The test work is intended for graduates who have not chosen physics to pass the exam.

At the end of December 2017, demo versions of VLOOKUP for 11 grades of 2018 were published on the FIPI official website.

After working on the network, real options with answers appeared.

VLOOKUP options in physics grade 11 with answers 2018

Option 1	answers + evaluation criteria
Option 2	answers + evaluation criteria
Option 3
Option 4
Option 5	answers + evaluation criteria
Option 6	answers + evaluation criteria
Option 9	answers + evaluation criteria
Option 10	answers + evaluation criteria
Option 11
Option 12

Testing work in physics includes 18 tasks, it takes 1 hour 30 minutes (90 minutes) to complete it. Participants in VLOOKUP in physics are allowed to use a calculator.

The work checks the assimilation of all sections of the basic level physics course: mechanics, molecular physics, electrodynamics, quantum physics and elements of astrophysics.

While completing VLOOKUP tasks in physics, eleventh graders must demonstrate an understanding of the basic concepts, phenomena, quantities and laws studied in the physics course, the ability to apply the knowledge gained to describe the structure and principles of operation of various technical objects or to recognize the studied phenomena and processes in the surrounding world. Also, within the framework of VLOOKUP, the ability to work with textual information of physical content is tested.

Recommended scale for converting the total score for the implementation of VLOOKUP in physics into a mark on a five-point scale

All-Russian test works (VPR) are final tests organized in individual academic subjects to assess the level of training of schoolchildren, taking into account the requirements of federal state educational standards. Their organization provides for a unified schedule, the use of unified assignment texts and unified assessment criteria.

VPRs are not an analogue of the state final attestation. They are held at the regional or school level.

The results can be used to formulate programs for the development of education at the level of municipalities, regions and in the country as a whole, to improve the methodology of teaching subjects in specific schools, as well as for individual work with students. VLOOKUP results do not affect obtaining a certificate and transfer to the next class. Rosobrnadzor does not recommend educational organizations to use the results of the VLOOKUP for assigning annual marks to students.