Physics 0625/22 October/November 2020: question paper and mark scheme

Question

The diagram shows a measuring device. 35 0 1 30 mm For which measurement is this device suitable? A diameter of a cylinder of aluminium of about 20 cm B distance between two molecules of zinc C length of a rod of iron of about 1 m D thickness of a sheet of copper of about 1.5 mm

Question

The graph shows how the speed of an object varies with time. speed 0 P Q time Which row describes the motion of the object at times P and Q? P Q A at rest accelerating B at rest decelerating C moving with constant speed accelerating D moving with constant speed decelerating

Question

A concrete block falls vertically from an aeroplane. The concrete block falls into the sea and sinks. Which graph shows the vertical motion of the concrete block? A B speed speed 0 0 0 time 0 time C D speed speed 0 0 0 time 0 time

Question

Which quantity is weight an example of? A acceleration B force C mass D pressure

Question

Which statement about the mass of an object is correct? A It changes when the object is lifted further from the ground. B It is the gravitational force on the object. C It is zero if the object is in orbit around the Earth. D It resists any change in motion of the object.

Question

A rectangular metal block is 20 cm long. The cross-sectional area of the block is 25 cm2. The mass of the block is 4000 g. What is the density of the metal? A 0.13 g / cm3 B 0.32 g / cm3 C 8.0 g / cm3 D 2000 g / cm3

Question

The diagram shows a beam lying on the ground. End Q is lifted from the ground by the force F. End P of the beam remains on the ground. 3.0 m 1.0 m F P Q G ground beam The length of the beam is 3.0 m and its weight is 600 N. The centre of mass of the beam at G is 1.0 m from end P. What is the size of the force F when it just raises end Q from the ground? A 200 N B 300 N C 400 N D 600 N

Question

The diagram shows a stand. The stand holds a heavy mass above the bench. heavy mass stand bench base Which two changes would definitely make the stand more stable? A Lower the mass and make the base narrower. B Lower the mass and make the base wider. C Raise the mass and make the base narrower. D Raise the mass and make the base wider.

Question

A footballer kicks a stationary football. His foot is in contact with the ball for 0.050 s. The mass of the ball is 0.40 kg. The speed of projection of the ball is 25 m / s. What is the average force exerted on the ball by his foot? A 0.32 N B 0.50 N C 200 N D 1300 N

Question

A woman of mass 50 kg has 81 J of kinetic energy. What is her speed? A 1.3 m / s B 1.6 m / s C 1.8 m / s D 3.2 m / s

Question

What is the source of the Sun’s energy? A chemical reactions in the Sun’s core B γ-emissions in the Sun’s core C nuclear fission in the Sun’s core D nuclear fusion in the Sun’s core

Question

To calculate the power produced by a force, the size of the force must be known. What else needs to be known to calculate the power? the distance that the force the time for which the moves the object force acts on the object A key B = needed C = not needed D

Question

A research submarine is at a depth of 10 000 m below the surface of the sea. The average density of the water above the submarine is 1030 kg / m3. The atmospheric pressure at the surface of the sea is 103 000 Pa. How many times greater is the pressure due to the sea water than the atmospheric pressure? A 10 B 100 C 1000 D 100 000

Question

The diagram shows a mercury barometer. Which height is used as a measurement of atmospheric pressure? D mercury C B A

Question

A student splashes water on to her face. Here are three statements about the effects. P The water uses energy to evaporate. Q The water gains energy from the student. R The face of the student cools. Which statements are correct? A P and Q only B P and R only C Q and R only D P, Q and R

Question

A bimetallic strip is used to control the temperature of electrical appliances. It is made of two different metals fixed together. The diagram shows the shape of the bimetallic strip before and after heating. metal P metal Q before heating after heating Which statement is correct? A Metal P contracts more than metal Q on heating. B Metal Q contracts more than metal P on heating. C Metal P expands more than metal Q on heating. D Metal Q expands more than metal P on heating.

Question

A student writes three statements about thermocouples. 1 They have a small thermal capacity. 2 They respond very slowly to temperature changes. 3 They can measure temperatures above 500 °C. Which statements are correct? A 1 only B 2 only C 1 and 3 D 2 and 3

Question

Four blocks are made from different metals. Each block is heated for five minutes with an identical heater. Assume there is no energy loss from the blocks. The table gives the masses of the blocks and the temperature rises. Which metal has the highest specific heat capacity? mass of block / kg temperature rise / °C A 2.0 5.0 B 2.0 9.0 C 4.0 5.0 D 4.0 9.0

Question

A scientist measures the air temperature at different heights from the floor in a cave. The results are recorded in the table. height / m temperature / °C 0 10 10 11 20 13 30 14 40 16 Why does altering the height affect the temperature of the air? A The molecules in warm air have less energy than the molecules in cool air. B The molecules in cool air are further apart than the molecules in warm air. C Warm air is less dense than cool air. D Cool air rises above warm air.

Question

Four solid spheres made of the same metal are heated to the same temperature. Which sphere initially loses thermal energy by radiation at the greatest rate? A diameter of 10 cm with a dull surface B diameter of 10 cm with a shiny surface C diameter of 5 cm with a dull surface D diameter of 5 cm with a shiny surface

Question

Which row correctly describes light waves? wave type direction of vibrations A longitudinal parallel to direction of wave travel B longitudinal perpendicular to direction of wave travel C transverse parallel to direction of wave travel D transverse perpendicular to direction of wave travel

Question

A radio transmitter broadcasts at a frequency of 200 kHz. What is the wavelength of these radio waves? A 6.7 × 10–4 m B 1.5 m C 1.5 × 103 m D 1.5 × 106 m

Question

An optical lever is a very sensitive device for detecting small rotations. A lamp sends a narrow beam of light on to a small plane mirror attached to a shaft whose rotation is to be measured. The operation of the device is shown in plan view. scale just scale just above lamp above lamp lamp lamp shaft shaft small small mirror mirror The beam from the lamp reflects from the mirror to give a small spot of light on a scale placed just above the lamp. The shaft and mirror rotate through 1°. The spot of light moves along the scale. The table shows the angle θ through which the reflected beam rotates and the conditions required for high sensitivity. Which row is correct? angle θ to achieve high sensitivity A 1° the lamp and scale need to be as close to the mirror as possible B 1° the lamp and scale need to be as far from the mirror as possible C 2° the lamp and scale need to be as close to the mirror as possible D 2° the lamp and scale need to be as far from the mirror as possible

Question

A student draws a diagram to illustrate the different sections of a longitudinal wave. Which labelled section is a rarefaction? A B D C

Question

The diagram shows white light passing through a prism. red violet white light Which description of what happens as the light passes into the prism is correct? A The speed of the red light is less than the speed of the violet light and the red light is the least refracted. B The speed of the red light is greater than the speed of the violet light and the red light is the least refracted. C The speed of the violet light is less than the speed of the red light and the violet light is the least refracted. D The speed of the violet light is greater than the speed of the red light and the violet light is the least refracted.

Question

A police car with its siren sounding is stationary in heavy traffic. A pedestrian notices that, although the loudness of the sound produced does not change, the pitch varies. Which row describes the amplitude and the frequency of the sound? amplitude frequency A constant constant B constant varying C varying constant D varying varying

Question

A piece of steel is slightly magnetised. It is hit several times with a hammer. What effect will this have on the steel? the steel is parallel to the steel is at right-angles a strong magnetic field to a weak magnetic field A it becomes magnetised more strongly it becomes magnetised more strongly B it becomes magnetised more strongly it loses its magnetism C it loses its magnetism it becomes magnetised more strongly D it loses its magnetism it loses its magnetism

Question

A student sets up four experiments using bar magnets and other metal objects. The N and S poles of the bar magnets are labelled N and S. 1 2 S N S N S N iron 3 4 S N copper S N N S Which pairs attract each other? A 1 and 2 B 1 and 3 C 2 and 4 D 3 and 4

Question

Which diagram represents the strength and direction of the magnetic field around a current-carrying conductor? (The direction of the current is into the page.) A B C D

Question

Which quantity is defined as the energy transferred by a cell in driving unit charge around a complete circuit? A current B electromotive force (e.m.f.) C power D resistance

Question

There is a current in a variable resistor when a potential difference (p.d.) is applied across it. In which situation is the current increased? A Decrease the p.d. and keep the resistance the same. B Decrease the p.d. and increase the resistance. C Keep the p.d. the same and decrease the resistance. D Keep the p.d. the same and increase the resistance.

Question

A student uses four ammeters P, Q, R and S to measure the current in different parts of the circuit shown. P Q A A R A S A Which two ammeters read the largest current? A P and Q B P and R C R and Q D R and S

Question

Which combination of logic gates gives the truth table shown? inputs output X Y Z 0 0 1 0 1 1 1 0 1 1 1 0 A B X X Z Z Y Y C D X X Z Z Y Y

Question

The diagram shows an a.c. generator used to power a lamp. The coil rotates in a clockwise direction. rotation of coil coil I X Y Which magnetic poles are X and Y? X Y A N pole N pole B N pole S pole C S pole N pole D S pole S pole

Question

A transformer is needed to convert a supply of 240 V a.c. into 4800 V a.c.. NP NS 240 V a.c. 4800 V a.c. Which pair of coils would be suitable for this transformer? number of turns number of turns on primary coil NP on secondary coil NS A 50 1 000 B 240 48 000 C 480 24 D 2000 100

Question

The diagram shows a coil of wire wrapped around a soft-iron rod. The wire is connected to a d.c. power supply as indicated. The apparatus is in a region which is totally shielded from the Earth’s magnetic field. + – soft-iron rod P A small compass needle is placed at point P. In which direction does the N pole of the compass needle point? A towards the bottom of the page B towards the left of the page C towards the right of the page D towards the top of the page

Question

Which statement is correct for the nucleus of any atom? A The nucleus contains electrons, neutrons and protons. B The nucleus contains the same number of protons as neutrons. C The nucleus has a total charge of zero. D The nucleus is very small compared with the size of the atom.

Question

The symbol represents a nucleus of zinc. Which row gives the numbers of protons and neutrons in this nucleus? number of number of protons neutrons A 30 38 B 30 68 C 38 30 D 38 68

Question

The diagram shows a beam of β-particles passing through a strong electric field. + β-particles – In which direction will the β-particles be deflected? A upwards towards the top of the page B downwards towards the bottom of the page C into the plane of the page D out of the plane of the page

Question

Which equation represents the β-decay of lead-209? 209 0 209 A 82Pb + –1e 83Bi 209 0 209 B 82Pb + –1e 81Tl 209 209 0 C 82Pb 83Bi + –1e 209 209 0 D 82Pb 81Tl + –1e