Physics 0625/12 October/November 2021: question paper and mark scheme

Question

Which list places units of length in increasing order of magnitude (size)? A cm → mm → m B mm → cm → m C mm → m → cm D m → mm → cm

Question

Which graph represents an object that is moving at constant speed? A B distance distance 0 0 0 time 0 time C D distance distance 0 0 0 time 0 time

Question

Which statement about the equation shown is correct? W = mg A g is a force, m and W are not forces. B m is a force, g and W are not forces. C W is a force, g and m are not forces. D None of g, m and W are forces.

Question

Which substance in the table has the lowest density? substance mass / g volume / cm3 A nylon 1.2 1.0 B cotton 1.5 1.0 C olive oil 1.8 2.0 D water 2.0 2.0

Question

The diagram shows a simple balance. The two loads, X and Y, can be moved along the beam. d X pivot Y Which graph shows how the moment produced by load Y varies as the perpendicular distance d from the pivot changes? A B moment moment 0 0 0 d 0 d C D moment moment 0 0 0 d 0 d

Question

A spacecraft is travelling in space with no resultant force and no resultant moment acting on it. Which statement about the spacecraft is correct? A Its direction is changing. B It is in equilibrium. C Its speed is decreasing. D Its speed is increasing.

Question

A student carries out an investigation by pulling four different boxes across the floor. The results are shown in the table. On which box is the most work done? frictional force needed distance moved to pull the box / N across the floor / m A 5 4 B 10 2 C 15 2 D 20 4

Question

Electrical energy may be obtained from nuclear fission. In which order is the energy transferred in this process? A nuclear fuel → generator → reactor and boiler → turbines B nuclear fuel → generator → turbines → reactor and boiler C nuclear fuel → reactor and boiler → generator → turbines D nuclear fuel → reactor and boiler → turbines → generator

Question

A stone falls. Which row gives the energy changes? gravitational kinetic energy potential energy A decreases decreases B decreases increases C increases decreases D increases increases

Question

A rope, connected to a pulley system and motor, is used to lift different objects through different distances. The time taken to lift each object is the same. The diagrams are not to scale. Which motor requires the greatest power? A B platform platform motor motor 2m 3m 10 kg 5 kg C D platform platform motor motor 1m 3m 10 kg 2 kg

Question

The diagram shows a simple mercury barometer. Which length is used to indicate atmospheric pressure in a simple mercury barometer? vacuum A D C B mercury

Question

A liquid is evaporating. The liquid is not boiling. Which statement about the liquid is correct at an instant in time? A Any molecule can escape, and from any part of the liquid. B Any molecule can escape, but only from the liquid’s surface. C Only molecules with enough energy can escape, and only from the liquid’s surface. D Only molecules with enough energy can escape, but from any part of the liquid.

Question

The temperature of the gas in a sealed container of constant volume decreases from 20 °C to 12 °C. Which row is correct? pressure of the gas average speed of in the container the molecules of gas A decreases decreases B stays the same increases C increases stays the same D stays the same decreases

Question

A long, thin bar of copper is heated gently and evenly along its length. copper bar heat What happens to the bar? A It becomes less heavy. B It becomes longer. C It becomes shorter. D It bends at the ends.

Question

A teacher makes the statement, ‘Object P has a higher thermal capacity than object Q.’ What does this statement mean? A Object P has a higher melting point than object Q. B Object P has a lower melting point than object Q. C The increase in temperature of object P is greater than that of object Q for the same increase in internal energy. D The increase in temperature of object P is smaller than that of object Q for the same increase in internal energy.

Question

The diagram shows a pan used for cooking food. handle of pan base of pan Which row is correct for the materials used to make the base and the handle of the pan? base of pan handle of pan A good thermal conductor good thermal conductor B good thermal conductor poor thermal conductor C poor thermal conductor good thermal conductor D poor thermal conductor poor thermal conductor

Question

The diagrams show two patterns produced by water waves. diagram 1 diagram 2 barrier barrier Which two effects are shown in the diagrams? diagram 1 diagram 2 A reflection diffraction B reflection refraction C refraction diffraction D refraction reflection

Question

Which row is not correct for a wave on the surface of water? quantity usual unit A amplitude m B frequency Hz C wavelength λ D speed m/s

Question

A thin, converging lens causes parallel rays of light to converge to a single point known as the principal focus. principal focus Which statement explains this? A The light diffracts. B The light disperses. C The light reflects. D The light refracts.

Question

The diagram shows a ray of light in air incident on a glass block. Some of the light is refracted and some of the light is reflected. Two angles, p and q, are marked on the diagram. ray of light q air p glass Which row gives the angle of incidence and states whether total internal reflection occurs? angle of total internal incidence reflection A p no B p yes C q no D q yes

Question

The letter F is reflected in a mirror. mirror What does the optical image look like? A B C D

Question

Visible light, X-rays and microwaves are all components of the electromagnetic spectrum. Which statement about the waves is correct? A In a vacuum, microwaves travel faster than visible light and have a shorter wavelength. B In a vacuum, microwaves travel at the same speed as visible light and have a shorter wavelength. C In a vacuum, X-rays travel faster than visible light and have a shorter wavelength. D In a vacuum, X-rays travel at the same speed as visible light and have a shorter wavelength.

Question

Which radiation has a higher frequency than red light? A ultraviolet B radio waves C microwaves D infrared

Question

What is ultrasound? A sound waves that are so loud that they damage human hearing B sound waves that are too high-pitched for humans to hear C sound waves that are too low-pitched for humans to hear D sound waves that are too quiet for humans to hear

Question

Which material is magnetic? A aluminium B copper C iron D silver

Question

Which circuit symbol represents a component used to measure electric current? A B C D A G V

Question

Four wires made of the same metal have different lengths and different diameters. Which wire has the lowest resistance? length diameter A long large B long small C short large D short small

Question

The diagram shows a circuit containing two resistors of resistance 1.0 Ω and 2.0 Ω. A voltmeter is connected across the 1.0 Ω resistor by connecting P to X. The reading on the voltmeter is 6.0 V. 1.0 Ω X 2.0 Ω Y P V P is moved to point Y in the circuit. What is the new reading on the voltmeter? A 3.0 V B 6.0 V C 12 V D 18 V

Question

Which device is used to measure the flow of charge in an electrical circuit? A ammeter B voltmeter C battery D newton meter

Question

Which circuit contains a fuse? A B A V C D A

Question

A student designs a circuit to turn on a fan when the temperature increases. Which component does the student need to use in her circuit? A B C D

Question

Two resistors, with resistances R1 and R2, are connected in parallel. The resistance R1 is greater than the resistance R2. R1 R2 What is the resistance of the parallel combination? A less than either R1 or R2 B equal to R1 C equal to R2 D the average of R1 and R2

Question

The diagram shows a motor connected to an a.c. supply. The circuit is incomplete. X Y M Which device needs to be connected between point X and point Y to prevent the wires from overheating if a fault in the motor causes the current to get too high? A an ammeter B a fuse C a transformer D a length of thick copper wire

Question

A hairdresser is using a hairdryer with a plastic casing. He notices that there is no wire attached to the earth pin of the plug. Why is an earth connection not needed? A Plastic is an insulator. B The hairdresser only touches the handle of the dryer. C The hairdryer uses a.c. so cannot give the hairdresser a shock. D Wet hands do not conduct electricity.

Question

Four positions of a current-carrying coil in a magnetic field, as in a d.c. motor, are shown. In diagrams 2 and 4, the coil is at an angle of 45° to the field lines. 1 2 3 4 N S N S N S N S coil Which row is correct? turning effect of the forces turning effect of the forces in positions 1 and 3 in positions 2 and 4 A different different B different same C same different D same same

Question

An electric drill, operating from a supply voltage of 240 V, uses a current of 3.5 A. Which rating of fuse should be used to protect the drill’s cable? A 250 V B 200 V C 5A D 3A

Question

A very important experiment improved scientists’ understanding of the structure of matter. The experiment involved α-particles being fired at a thin, gold foil. What happened? A All the α-particles were absorbed by the nuclei of the gold atoms. B All the α-particles were unaffected by the gold atoms. C Some of the α-particles were attracted by the neutrons in the nuclei of the gold atoms. D Some of the α-particles were repelled by the protons in the nuclei of the gold atoms.

Question

A sample contains 0.0016 g of a radioactive isotope. After 4.0 hours the mass of the radioactive isotope in the sample falls to 0.00080 g. What is the half-life of the radioactive isotope? A 2.0 hours B 4.0 hours C 8.0 hours D 16 hours

Question

A sample of a radioactive isotope has a mass of 100 g. The half-life of the radioactive isotope is 6.0 hours. Which graph shows the decay for this isotope? A B mass of 100 mass of 100 isotope 80 isotope 80 remaining 60 remaining 60 /g 40 /g 40 20 20 0 0 0 1 2 3 4 5 6 7 8 9 10 11 12 0 1 2 3 4 5 6 7 8 9 10 11 12 time / hours time / hours C D mass of 100 mass of 100 isotope 80 isotope 80 remaining 60 remaining 60 /g 40 /g 40 20 20 0 0 0 1 2 3 4 5 6 7 8 9 10 11 12 0 1 2 3 4 5 6 7 8 9 10 11 12 time / hours time / hours

Question

Which statement best describes background radiation? A any harmful level of radiation B radiation that is only found in space C radiation from natural sources D radiation that is absorbed by rocks