IGCSE Physics 0625 Paper 22, Oct/Nov 2025

Which quantities are both vectors? A acceleration and force B acceleration and pressure C density and force D density and pressure

How is the deceleration of an object calculated from a speed–time graph? A It is the area under the graph. B It is the gradient of the graph. C It is the difference between two readings on the horizontal (x) axis. D It is the difference between two readings on the vertical (y) axis.

A space probe that has a mass of $600\text{ kg}$ is on the planet Mars. The acceleration of free fall on Mars is $4.0{\text{ m/s}}^2$. What is the weight of the space probe on Mars? A $60\text{ N}$ B $150\text{ N}$ C $2400\text{ N}$ D $6000\text{ N}$

Students are asked to predict the order in which three liquids, P, Q and R, will float on each other. They are told that the liquids will not mix. The diagrams show how the density of liquid P is determined. The table shows the densities of Q and R.

The liquids are poured gently into a tall beaker and allowed to settle. Which diagram shows the liquids settled in the correct order? A P, R, Q (from top to bottom) B Q, P, R (from top to bottom) C Q, R, P (from top to bottom) D R, P, Q (from top to bottom)

A force $F$ is applied to a spanner, as shown. Which action increases the moment of $F$ about the centre of the nut? A applying the force $F$ to the right-hand end of the spanner handle B applying the force $F$ parallel to the spanner handle C spraying oil on the nut D using a shorter spanner

Diagram 1 shows a ball X of mass $0.15\text{ kg}$ travelling horizontally with a velocity of $2.1\text{ m/s}$ towards ball Y travelling at $0.4\text{ m/s}$ in the opposite direction. Diagram 2 shows the velocities of the balls immediately after they collide. What is the mass of ball Y? A $0.15\text{ kg}$ B $0.19\text{ kg}$ C $0.35\text{ kg}$ D $0.79\text{ kg}$

A mass is suspended from a vertical spring. The mass is pulled downwards causing the spring to extend further. The mass is held in this position and then released. Which energy changes occur during the initial movement of the mass when the mass is released?

Which energy resource stores kinetic energy? A coal B nuclear fission C solar D wind

Two beakers are filled to the same depth, one with water and one with oil. The density of water is $1000{\text{ kg/m}}^3$. The density of oil is $920{\text{ kg/m}}^3$. In which position is the pressure the greatest? A near the surface of the water B near the bottom of the water C near the surface of the oil D near the bottom of the oil

The pressure of the air in a car tyre rises after a long journey. This is caused by a change in the average speed of the air particles and a change in the temperature of the air in the tyre. Which row describes the changes that have caused the air pressure in the tyre to rise?

In which range of temperatures is water a liquid? A $0\text{ K}$ to $100\text{ K}$ B $0\text{ K}$ to $273\text{ K}$ C $100\text{ K}$ to $373\text{ K}$ D $273\text{ K}$ to $373\text{ K}$

The diagram represents the particle arrangements in samples of three different substances, P, Q and R. The samples have equal volumes and the same temperature. The samples are heated. The temperature increase of each sample is the same and no changes of state take place. Which row shows possible percentage increases in volume for the three samples?

A cup contains $0.25\text{ kg}$ of water at $60{}^{\circ }\text{C}$. Some time later, the water has cooled to $20{}^{\circ }\text{C}$. How much energy has been transferred from the water to the surroundings? (The specific heat capacity of water is $4200\text{ J}\mathrm{/}({\text{kg }}^{\circ }\text{C})$.) A $21000\text{ J}$ B $42000\text{ J}$ C $63000\text{ J}$ D $84000\text{ J}$

A pure substance is heated slowly. The temperature of the substance is measured as it starts to melt and when it finishes melting. Which statement is correct? A The temperature decreases slightly as the substance melts. B The temperature fluctuates as the substance melts. C The temperature increases as the substance melts. D The temperature stays the same as the substance melts.

A lamp has a metal filament that glows when heated by an electric current. The middle of the filament has a very high temperature. The ends of the filament are connected to the base of the lamp and are cooler. Which statement is correct? A Some thermal energy is conducted to the base of the lamp. B The filament radiates energy equally at all points along its length. C The lamp transfers all of the input energy as visible light. D When the potential difference (p.d.) across the filament is halved, the power output is halved.

A liquid passes through pipes inside a refrigerator. The liquid warms as the inside of the refrigerator cools. The warm liquid is then passed through pipes on the outside of the refrigerator to cool it before it goes back through the refrigerator. The diagrams show two designs for the outside cooling pipes. One design has copper rods, called fins, attached to the pipes. The outside pipes and fins can be painted silver or black. Which design of outside pipes will cool the liquid most quickly? A painted black with fins B painted black without fins C painted silver with fins D painted silver without fins

An earthquake-monitoring station records the arrival of 16 complete wavelengths of an earthquake wave in a time of $20\text{ s}$. The speed of the earthquake wave is $6.0\text{ km/s}$. What is the wavelength of the earthquake wave? A $1.3\times {10}^{-4}\text{ m}$ B $2.1\times {10}^{-4}\text{ m}$ C $4.8\times {10}^3\text{ m}$ D $7.5\times {10}^3\text{ m}$

Which statement is correct? A Seismic S-waves are longitudinal. B Sound waves are longitudinal. C The amplitude is always greater than the wavelength in a longitudinal wave. D The vibration is at right-angles to the direction of propagation in a longitudinal wave.

A water droplet is falling towards a horizontal plane mirror. At one moment, the droplet is a distance of $1.5\text{ m}$ above the mirror and falling at a speed of $2.0\text{ m/s}$. What is the distance between the droplet and its image and what is the speed of the image at this moment?

Total internal reflection may occur when light reaches an air–glass boundary. Under which conditions is light totally internally reflected?

A long-sighted person cannot see objects clearly that are a short distance away because the image is blurred. Where is the image formed relative to the retina and which type of lens is used to correct long-sightedness?

What is the speed of infrared radiation in glass with a refractive index of 1.5? A $340\text{ m/s}$ B $2.0\times {10}^8\text{ m/s}$ C $3.0\times {10}^8\text{ m/s}$ D $4.5\times {10}^8\text{ m/s}$

Sound travels through air as a series of compressions and rarefactions. Which statement correctly compares a compression with a rarefaction? A In a compression, the wavelength is longer than in a rarefaction. B In a compression, the wavelength is shorter than in a rarefaction. C In a compression, the density of the air is greater than in a rarefaction. D In a compression, the density of the air is lower than in a rarefaction.

Which statements about magnets are correct? 1 Permanent magnets are made of steel. 2 Electromagnets are temporary magnets. 3 A magnet can be used to induce magnetism in an iron bar. A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only

In a circuit, two identical lamps are in parallel. The parallel pair of lamps is in series with a resistor and a battery. The battery does $120\text{ J}$ of work moving $50\text{ C}$ of charge around the circuit in time $t$. In each lamp, $40\text{ J}$ of work is done by the charge that passes through it in time $t$. The electromotive force (e.m.f.) of the battery is $E$ and the potential difference (p.d.) across one lamp is $V$. Which statement about $E$ and $V$ is correct? A $E$ is $2.4\text{ V}$ and $V$ is $0.80\text{ V}$. B $E$ is $2.4\text{ V}$ and $V$ is $1.6\text{ V}$. C $E$ is $4.8\text{ V}$ and $V$ is $2.4\text{ V}$. D $E$ is $4.8\text{ V}$ and $V$ is $4.8\text{ V}$.

Two wires, X and Y, are made from the same metal and have the same resistance. Which row identifies a possible pair of values for X and for Y?

Which circuit contains a light-dependent resistor (LDR)? A circuit with a variable resistor B circuit with a thermistor C circuit with a fixed resistor D circuit with a light-dependent resistor

A teacher asks three students to write down an equation to determine the combined resistance $R_C$ of resistors with resistances $R_Y$ and $R_Z$. Which students are correct? student 1 $\frac{1}{R_C}=\frac{1}{R_Y}+\frac{1}{R_Z}$ student 2 $\frac{1}{R_C}=\frac{1}{R_Y+R_Z}$ student 3 $R_C=\frac{1}{R_Y}+\frac{1}{R_Z}$ A 1 and 2 B 1 only C 2 and 3 D 3 only

An electrical appliance has a symbol on it to indicate it is double-insulated. Which statement is correct? A A two-core, flexible cable with no earth wire is used to connect it to the mains supply. B It needs an earth wire that is connected to a fuse. C No fuse or circuit breaker is needed. D The cable should be connected to the live and earth connectors of the plug but not the neutral.

A length of wire moves across the space between the poles of a magnet. A voltmeter measures the electromotive force (e.m.f.) generated between the two ends of the wire. What gives the highest reading on the voltmeter?

The diagram shows a simple a.c. generator. What is connected to G and H so that alternating current can be provided to an external circuit? A cell B commutator C slip rings D soft iron core

The diagrams show the coil in a d.c. electric motor in two positions. As the coil rotates through ${180}^{\circ }$, the direction of the current in the coil reverses from PQRS to SRQP. Which part of the motor is responsible for reversing the current? A the brushes B the coil C the magnets D the split-ring commutator

The arrow shows the path of an $\alpha$-particle travelling towards the centre of a gold nucleus. Which description of the path of the $\alpha$-particle after striking the gold nucleus is correct? A The $\alpha$-particle is deflected through a very small angle towards the top of the page. B The $\alpha$-particle is deflected back along its initial path. C The $\alpha$-particle carries on in a straight line with no deflection. D The $\alpha$-particle is captured by the nucleus and goes into orbit around it.

A teacher writes the nuclide equation for a fusion reaction. $${}_1^2\text{H}+{}_1^X\text{H}\to {}_2^4\text{Q}+{}_0^1\text{n}$$ What is the missing number X and the missing element Q?

Radon gas is a source of radiation that contributes to background radiation. What does not contribute to background radiation? A electromagnetic rays B food and drink C rocks D seismic waves

Two beams of radiation, P and S, enter an electric field, as shown. Which types of radiation are P and S?

Which change takes place in the nucleus when it decays by beta ($\beta$) emission? A $\text{neutron}+\text{electron}\to \text{proton}$ B $\text{neutron}\to \text{proton}+\text{electron}$ C $\text{proton}+\text{electron}\to \text{neutron}$ D $\text{proton}\to \text{neutron}+\text{electron}$

A space probe measures the gravitational field strength at four different distances from a planet. The point furthest from the planet is measured first and the point nearest the planet is measured last. In which order were the measurements taken? A $6.3\text{ N/kg}$, $10\text{ N/kg}$, $14\text{ N/kg}$, $20\text{ N/kg}$ B $10\text{ N/kg}$, $14\text{ N/kg}$, $6.3\text{ N/kg}$, $20\text{ N/kg}$ C $20\text{ N/kg}$, $14\text{ N/kg}$, $6.3\text{ N/kg}$, $10\text{ N/kg}$ D $20\text{ N/kg}$, $14\text{ N/kg}$, $10\text{ N/kg}$, $6.3\text{ N/kg}$

The galaxy Draco II is a distance of $6.6\times {10}^{20}\text{ m}$ from Earth. What is this distance in light-years? A $1.4\times {10}^4\text{ light-years}$ B $6.9\times {10}^4\text{ light-years}$ C $1.4\times {10}^6\text{ light-years}$ D $6.9\times {10}^6\text{ light-years}$

What is a possible result of a supernova explosion? A a neutron star B a red giant star C a red supergiant star D a white dwarf star