IGCSE Physics 0625 Paper 13, Oct/Nov 2023

A student uses a metre ruler to measure the length of six identical table-tennis balls placed between two wooden blocks. What is the diameter of one ball? A 4 cm B 5 cm C 6 cm D 8 cm

A train is on a straight track. The graph shows how a quantity $y$ varies with time. Which statements can be true? 1 The train is stationary and $y$ represents the distance from the last station. 2 The train is moving and $y$ represents the distance from the last station. 3 The train is stationary and $y$ represents the speed of the train. 4 The train is moving and $y$ represents the speed of the train. A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4

A vehicle sent to explore the surface of Mars has a mass of $200\text{ kg}$. The acceleration of free fall on Mars is $3.7{\text{ m / s}}^2$. What is the weight of the vehicle on Mars? A 20 N B 54 N C 740 N D 2000 N

A student writes about mass and weight. Which statement is correct? A A ship which is floating has mass but no weight. B Mass is a scientific word that means the same as weight. C Mass is measured in newtons. D The mass of an astronaut is the same on the Moon as on the Earth.

A student carries out an experiment to determine the density of an irregularly shaped solid. The solid is placed on a balance and a reading is taken. The solid is then immersed in a liquid in a measuring cylinder. Which values should be used in the calculation?

A uniform rod rests on a pivot at its centre. The rod is not attached to the pivot. Forces are then applied to the rod in four different ways, as shown. The weight of the rod can be ignored. Which diagram shows the rod in equilibrium? A [Diagram A: 100 N acting downwards at the left end, 100 N acting downwards at the right end] B [Diagram B: 100 N acting upwards at the left end, 100 N acting upwards at the right end] C [Diagram C: 100 N acting upwards at the left end, 100 N acting downwards at the right end] D [Diagram D: 100 N acting upwards at the left end, 100 N acting downwards at the left end, 100 N acting downwards at the right end]

The diagram shows a beam balanced on a pivot. Two forces, $X$ and $Y$, are acting on the beam. Which calculation gives the moment of the force $Y$ about the pivot? A $Y\times (a+b)$ B $\frac{Y}{(a+b)}$ C $Y\times b$ D $\frac{Y}{b}$

A mass bounces up and down on a steel spring. The diagram shows the mass and the spring at different points during the motion. At which point is the least energy in the gravitational potential store of the mass and at which point is the most energy in the elastic store of the spring?

Electrical power is generated from different resources. Some of these resources are listed. • chemical energy stored in biofuels • chemical energy stored in fossil fuels • energy stored in tides • geothermal resources • hydroelectric resources • light from the Sun • nuclear fuel How many of the resources listed are classified as renewable? A 3 B 4 C 5 D 6

A microwave oven is rated at $900\text{ watts}$. Which statement correctly describes the meaning of this value? A 900 joules are transferred every second. B 900 amperes are transferred every second. C 900 volts are transferred every second. D 900 ohms are transferred every second.

Why is it easier to push a sharp nail, rather than a blunt nail, into a piece of wood? A The sharp nail exerts a larger force on the wood. B The sharp nail exerts a smaller force on the wood. C The sharp nail exerts a larger pressure on the wood. D The sharp nail exerts a smaller pressure on the wood.

A sealed bottle of constant volume contains air. The air in the bottle is heated by the Sun. What is the effect on the average speed of the air particles in the bottle and the average distance between them?

Which graph shows the relationship between the pressure $p$ of a fixed mass of gas and its volume $V$ at a constant temperature?

What happens when a metal block is heated? A Its width, height and length all increase. B Its width increases only. C Its height increases only. D Its length increases only.

Which statement about the temperature of the solid describes what happens when a solid is melting? A The temperature increases and there is an input of energy. B The temperature increases and there is no input of energy. C The temperature remains constant and there is an input of energy. D The temperature remains constant and there is no input of energy.

A cupboard is placed in front of a heater. Air can move through a gap under the cupboard. Which row describes the temperature and the direction of movement of the air in the gap?

Which statement about waves is correct? A All waves can travel through a vacuum. B All waves travel at the same speed. C Seismic S-waves can be modelled as longitudinal waves. D Waves transfer energy without transferring matter.

The diagram shows a transverse wave. Which row identifies the amplitude and the wavelength of the wave?

A beam of light from the Sun strikes a prism. The dispersed beam is incident on a white wall between X and Y. Which colours are seen at X, Z and Y?

The diagram shows a ray of light incident on a plane mirror. The angle between the ray and the mirror is ${35}^{\circ }$. The ray is reflected by the mirror. What is the angle of reflection? A ${35}^{\circ }$ B ${55}^{\circ }$ C ${70}^{\circ }$ D ${110}^{\circ }$

A thin converging lens in a camera produces a real image on a photo-sensitive surface, as shown. At which position is the image of the top of the object formed?

The diagram shows the electromagnetic spectrum. $$\gamma \text{-rays}\text{E}\text{ultraviolet}\text{F}\text{infrared}\text{microwaves}\text{G}$$ Which types of wave are E, F and G?

A sound is produced and an echo is heard after the sound reflects off a wall. How do the properties of the echo compare to the original sound wave?

Which metal can be attracted by a magnet? A zinc B lead C iron D copper

A student uses an ammeter to measure the current in a resistor. He considers three different circuits, as shown. In which of the circuits does the ammeter measure the current in the resistor? A 1, 2 and 3 B 1 and 2 only C 1 only D 3 only

Which substances both contain large concentrations of free electrons? A aluminium and glass B copper and water C copper and nylon D silver and gold

What is the unit of resistance? A ampere B ohm C volt D watt

A teacher wishes to show the production of electrostatic charges. She holds a rod and rubs it with a cotton cloth. A copper rod, a glass rod, a plastic rod and a steel rod are available. Which two rods would both be suitable to use? A a copper rod and a glass rod B a glass rod and a plastic rod C a plastic rod and a copper rod D a plastic rod and a steel rod

Resistors of resistance $2.0\mathrm{\Omega }$ and $3.0\mathrm{\Omega }$ are connected in two different circuits. What is the total resistance in each circuit?

The current in an electrical heater is $5.0\text{ A}$. The heater is connected to the mains by a flexible cable that can carry a current of up to $15\text{ A}$. The mains circuit can carry a current of up to $30\text{ A}$. Different fuses are available to protect the heater’s cable. Which fuse is the most suitable? A 4.0 A B 10 A C 20 A D 40 A

A generator uses the principle of electromagnetic induction. Which change would increase the induced electromotive force (e.m.f.) in the coil? A increasing the number of turns in the coil B placing the magnets further apart C using a coil made from steel wire D reversing one of the magnets

A current passes along a wire placed between the poles of a permanent magnet. The wire experiences a force due to the magnetic field. What will change the direction of this force? A increasing the current B reversing the current C increasing the strength of the magnetic field D using an electromagnet with the same polarity as the permanent magnet

What is a transformer used for? A changing a direct current into an alternating current B changing the magnitude of an alternating voltage C reducing the frequency of an alternating current D switching off the current in a circuit when there is a fault

What are the relative charges on a proton, a neutron and an electron?

The half-life of carbon-14 is $5700\text{ years}$. An object containing carbon-14 has a count rate of $100\text{ counts / minute}$ when it is first formed. The graph shows how the count rate decreases over time. Which point on the graph corresponds to a time $11400\text{ years}$ after the formation of the object?

Which type of radioactive decay causes the nucleus of one element to change into the nucleus of another element?

A scientist needs to use a source of $\gamma$-rays as safely as possible. Which action will not reduce the total radiation that reaches the scientist? A keeping the distance between the source and the scientist as large as possible B keeping the temperature of the source as low as possible C keeping the time for which the scientist uses the source as small as possible D placing a lead screen between the scientist and the source

Which time period is approximately equal to 24 hours? A the time for the Earth to complete one rotation on its axis B the time for the Earth to orbit the Sun C the time for the Moon to orbit the Earth D the time for the Sun to orbit the Earth

The nearest star to the Sun is about four light-years away from the Earth. A student makes three statements about the star. 1 Light from the star takes about four years to reach the Earth. 2 Light from the Sun takes about four years to travel to the star and back to the Earth. 3 The star is outside our galaxy. Which statements are correct? A 1, 2 and 3 B 1 and 3 only C 1 only D 2 and 3 only

The table shows some elements and some regions of the electromagnetic spectrum. Which row shows one of the most common elements in the Sun and one of the regions in which the Sun radiates most of its energy?