Physics 0625/22 October/November 2021: question paper and mark scheme

Question

A student is taking some measurements. Which measurement is taken directly using a micrometer screw gauge? A 0.52 g / mm2 B 0.52 g / mm3 C 0.52 mm D 0.52 mm2

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

In which situation does object X have a greater mass than object Y? A Object X is in a larger gravitational field than object Y and both have the same weight. B Object X shows a greater resistance to change in motion than object Y and both experience the same resultant force. C Object X has a lower density than object Y and both occupy the same volume. D Object X moves at a greater speed than object Y and both possess the same kinetic energy.

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

Three simple machines are shown. 1 2 3 moving soil with cutting string screwing a screw a wheelbarrow with scissors with a screwdriver Which machines are an application of the moment of a force? A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only

Question

A spring, which obeys Hooke’s law, has an unstretched length of 10 cm. A load of 20 N is suspended from the spring. The new length of the spring is 36 cm. What is the spring constant k of the spring? A 0.56 N / cm B 0.77 N / cm C 1.3 N / cm D 1.8 N / cm

Question

A rocket is launched upwards from the surface of the Moon. Hot gases are ejected downwards over a very short period of time. Which statement is not correct? A The rocket experiences a downward force. B The rocket experiences an upward force. C The total momentum of the hot gases is equal to the momentum of the rocket. D The total momentum of the hot gases and rocket when the hot gases have been ejected is zero.

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 box of mass m slides down a slope of length l against a frictional force F. It descends a vertical height d. direction of motion F l mass m d stop As the box slides down the slope, it loses gravitational potential energy and it does work against the friction. Which row gives the loss in gravitational potential energy and the work done against friction? loss in gravitational work done potential energy against friction A mgd Fl B mgd Fd C mgl Fl D mgl Fd

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

Which equation can be used to calculate the pressure at a depth h beneath the surface of a liquid? hρ A p= h B p= C p = hρg D p= 1 ρg g hρ g

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

A gas is contained in a sealed container in a laboratory. The temperature of the gas increases. What happens to the average speed and what happens to the total kinetic energy of the gas molecules? average speed total kinetic energy A does not change does not change B does not change increases C increases does not change D increases increases

Question

An aluminium block has a mass of 200 g. The specific heat capacity of aluminium is 900 J / (kg °C). How much energy is needed to increase the temperature of the block from 20 °C to 110 °C? A 2.0 J B 2000 J C 16 200 J D 16 200 000 J

Question

The diagram shows the apparatus used to measure the specific latent heat of vaporisation of water. 2 kW heater water After the water begins to boil, 110 g of water is converted to steam in 120 s. Using these results, what is the value of the specific latent heat of vaporisation of water? A 1.8 J / kg B 1800 J / kg C 2200 J / kg D 2 200 000 J / kg

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 diagram shows the pattern of water waves as they pass through a narrow gap. narrow gap between two barriers Which row names the process shown and describes the effect of using a wider gap? name of process wider gap A refraction waves spread out less B refraction waves spread out more C diffraction waves spread out less D diffraction waves spread out more

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

The diagram shows how a ray of light refracts when going from air to Perspex. x air w Perspex y z The critical angle of Perspex is c. Which expression is correct? A sin x = sin c sin z B sin z = sin c sin x C sin w = sin c sin y sin y D = sin c sin w

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

The Sun emits infrared radiation and light. Light from the Sun reaches the Earth in 8 minutes. Which row gives correct information about the infrared radiation? wavelength of time taken for infrared infrared radiation radiation to reach the Earth A longer than wavelength of light 8 minutes B longer than wavelength of light much less than 8 minutes C shorter than wavelength of light 8 minutes D shorter than wavelength of light much more than 8 minutes

Question

Which statement about electromagnetic waves is not correct? A They travel at 3 × 108 m / s in a vacuum. B They transfer energy. C They travel at 340 m / s in air. D They are transverse waves.

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 diagram shows the electric field pattern between two oppositely charged parallel metal plates? A B C D + – + – + – + –

Question

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

Question

The graph shows the current–voltage characteristic for a conductor. current R Q P 0 0 voltage Where on the graph can Ohm’s law be applied to the conductor? A at Q only B between P and Q C between P and R D between Q and R

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

There is a current I in a resistor. The potential difference (p.d.) across the resistor is V. Which other physical quantity is needed to be able to determine the energy transferred W by the resistor? A the electromotive force (e.m.f.) E of the source B the power P dissipated C the resistance R of the resistor D the time t for which there is a current in the resistor

Question

The diagrams show pairs of circuits containing logic gates. In which diagram does the lower circuit of the pair behave differently from the upper circuit? A B C D

Question

Several cells are connected in series, as shown. What is the combined electromotive force (e.m.f.) of the cells? A the average of the e.m.f.s of the separate cells B the e.m.f. of one of the cells C the product of the e.m.f.s of the cells D the sum of the e.m.f.s of the cells

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

The diagram shows a wire between two magnets. An electromotive force (e.m.f.) is induced in the wire when it is moved up between the two magnets. N S Four tests are done. 1 The direction of movement of the wire is reversed. 2 The direction of the magnetic field is reversed. 3 The wire is moved more quickly. 4 The magnetic field strength is decreased. Which tests will induce a smaller e.m.f. in the wire? A 1 and 2 B 1 and 3 C 3 and 4 D 4 only

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

The diagram shows the magnetic field due to a current in a solenoid. direction of current The direction of the current is reversed. Which row describes the effect that this has on the magnitude and on the direction of the magnetic field? magnitude of direction of magnetic field magnetic field A increases changes B increases unchanged C unchanged changes D unchanged unchanged

Question

The nucleus of an americium atom contains 146 neutrons and 95 protons. It decays by emitting an α-particle. How many neutrons and how many protons remain in the nucleus when this form of americium decays? number of neutrons number of protons remaining remaining A 142 93 B 142 95 C 144 93 D 144 95

Question

A sample of americium decays and changes into neptunium. The half-life of americium is 432 years. Which fraction of the americium will remain after 1728 years? A 0 B 1 C 1 D 1 16 8 4

Question

The graph shows the decay curves of four different radioactive isotopes. Which isotope has the largest half-life? A count rate B C D 0 0 time

Question

The diagrams show α-particles and β-particles passing through an electric field. Which diagram shows the correct paths of the α-particles and β-particles? A B + + + + + + + + + + + + – – – – – – – – – – – – C D + + + + + + + + + + + + – – – – – – – – – – – –