IGCSE Physics (0625) — May–June 2025, Paper 21
40 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →The speed-time graph for a racing car is divided into four sections, P, Q, R and S. The car starts the race but soon crashes into a wall of tyres. The graph shows speed on the…
Answer this question and get it marked →The diagram shows the four forces acting on an aircraft in flight. The forces are: 120 kN acting vertically upwards (lift), 60 kN acting vertically downwards (weight), 60 kN…
Answer this question and get it marked →The diagrams show two metal blocks, X and Y, suspended from identical force meters. X and Y have identical dimensions. The force meter for block X reads about 2 N. The force meter…
Answer this question and get it marked →A girl has a gold necklace. Which apparatus does she need to find the density of the gold? The options are given as a table (key: tick = needed, cross = not needed): option…
Answer this question and get it marked →A spring has a length of 25 cm when a load of 2.0 N is suspended from it. The spring has a length of 35 cm when a 7.0 N load is used. What is the spring constant of the spring? A…
Answer this question and get it marked →The diagrams E-H show a block of wood on a frictionless surface. In each diagram, the block has two forces acting on its sides. E: a 2 N force acting to the right at the top of…
Answer this question and get it marked →Which statement is not correct? A the momentum of a system is conserved in all interactions B impulse = change of momentum C force acting = change of momentum x time D momentum =…
Answer this question and get it marked →A force acting on a moving ball causes its motion to change. This force stays constant. What makes the force produce a greater change in the motion of the ball? A decreasing the…
Answer this question and get it marked →A farmer has two carts. The carts have the same weight, but one has four narrow wheels and the other has four wide wheels. Which cart wheels sink less into soft ground and what is…
Answer this question and get it marked →A hot gas and a cool liquid are at the same pressure. Which row describes the separation and the motion of the particles of a hot gas compared to those of a cool liquid? option…
Answer this question and get it marked →A fixed mass of gas has a volume of 1.2 m^3 and is at a pressure of 200 kPa. The gas expands at constant temperature to a volume of 1.8 m^3. What is the new pressure of the gas? A…
Answer this question and get it marked →The specific heat capacity of solid P is greater than that of solid Q. What does this statement mean? A Less energy is needed to raise the temperature by 1 C of unit mass of solid…
Answer this question and get it marked →When water evaporates, what escapes from the surface of the water? A individual atoms B individual molecules C individual protons D tiny drops of water
Answer this question and get it marked →A sealed container of gas is heated. The pressure of the gas increases. Which statement explains this increase in pressure? A The forces of the gas particles striking the walls of…
Answer this question and get it marked →A student has a copper rod and a wooden rod. Both rods have the same dimensions. The student puts one end of each rod into a beaker of crushed ice. After a few minutes, the…
Answer this question and get it marked →The diagram shows a black object X at constant temperature. Arrows on the diagram represent the absorption and emission of thermal radiation at the surface (arrows point both…
Answer this question and get it marked →The diagram shows a cork with a weight attached so that the cork floats upright in water. The cork is at the water surface and the weight hangs below it on a thread. Transverse…
Answer this question and get it marked →A thin converging lens is used as a magnifying glass. How does the image compare with the object? A real and inverted B real and upright C virtual and inverted D virtual and…
Answer this question and get it marked →The diagram shows two plane mirrors at 90 degrees to each other. A ray of light is incident on one of the mirrors. The ray reflects off both mirrors before reaching a screen. The…
Answer this question and get it marked →The speed of light in a material is 50% of the speed of light in air. What is the refractive index of the material? A 0.5 B 2.0 C 6.0 x 10^8 D 1.5 x 10^8
Answer this question and get it marked →A beam of white light is split into a spectrum of seven colours. Which name is given to this process? A diffraction B dispersion C reflection D refraction
Answer this question and get it marked →Satellites are sometimes used to receive and re-transmit television signals. Which row shows the type of satellite and the electromagnetic waves used? option type of satellite…
Answer this question and get it marked →A sound wave travels through the air and strikes a solid block of steel. Some of the sound is reflected from the steel, and some is transmitted through the steel. How does the…
Answer this question and get it marked →The diagram shows a bracelet containing two magnets. The arrows represent the pattern and the direction of the magnetic field due to the magnets. The two magnets are at the ends J…
Answer this question and get it marked →Which row describes an electric field and its direction? option description of electric field direction of electric field -------- --------------------------------…
Answer this question and get it marked →Copper wire is available in fixed lengths but in various diameters d. Each wire has a different resistance R. Which relationship between R and d is correct? A R is directly…
Answer this question and get it marked →The diagram shows three 20 ohm resistors, R1, R2 and R3, and a switch S connected to a d.c. power supply. R1 and R2 are connected in parallel with each other; the switch S can…
Answer this question and get it marked →The circuits shown all include a d.c. power supply, one diode and two light-emitting diodes (LEDs). Each circuit A-D is a loop connected to a d.c. supply (left terminal +, right…
Answer this question and get it marked →A wire connected to a resistor R is moved in a magnetic field. A current is induced in the direction shown. A magnet has its N pole on the left and S pole on the right, so the…
Answer this question and get it marked →Which component is not found in an a.c. generator? A coil of wire B split-ring commutator C magnetic poles D slip rings
Answer this question and get it marked →There is a current in a straight metal wire in the direction shown. The wire is vertical and the current is directed upwards (out toward the viewer looking from vertically above).…
Answer this question and get it marked →A simple transformer contains an iron core. What is the function of the iron core in the transformer? A to conduct current from the primary coil to the secondary coil B to enable…
Answer this question and get it marked →In an alpha particle scattering experiment, a beam of alpha particles is fired at a very thin piece of gold foil. The beam of alpha particles arrives horizontally from the left…
Answer this question and get it marked →An atom of boron contains 5 protons and 5 electrons. The nucleon number of the atom is 11. How many neutrons are there in the atom? A 5 B 6 C 11 D 16
Answer this question and get it marked →A detector placed near a radioactive isotope gives a measured count rate of 800 counts/minute. The half-life of the isotope is three hours. The background count rate is 32…
Answer this question and get it marked →Sodium-24 is a radioactive isotope that emits beta radiation. Which nuclear equation shows how sodium-24 decays? A (24,11)Na - (24,12)Mg + (0,-1)beta B (24,11)Na - (24,10)Ne +…
Answer this question and get it marked →Which safety precautions must be taken when using a source of gamma radiation? 1 Reduce the distance between the source and the person. 2 Reduce the time of exposure to the…
Answer this question and get it marked →A student defines three periods of time: - the time TS taken for the Earth to orbit the Sun - the time TR taken for the Earth to rotate once on its axis - the time TM taken for…
Answer this question and get it marked →Which statement about the Universe is correct? A The Universe consists of 100 000 galaxies. B Redshift is a decrease in the observed wavelength of electromagnetic radiation…
Answer this question and get it marked →Which statement about the cosmic microwave background radiation (CMBR) is correct? A CMBR now has a frequency higher than that of infrared radiation. B CMBR has always had exactly…
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