Exam-style questions by topic — OCR GCSE Physics
One question for each of 27 topics. These are written for this specification by MasteryMind. They are not past-paper questions, and they are not from OCR.
The particle model
In the plum pudding model of the atom, how was the positive charge arranged?
Practise The particle modelChanges of state
A sample of candle wax is melted and then allowed to cool and solidify. Which statement best explains why melting the wax is a physical change rather than a chemical change?
Practise Changes of statePressure
A weather balloon rises from the ground into the upper atmosphere. Why does the pressure on the outside of the balloon decrease as it climbs?
Practise PressureNewton's laws
An object has an inertial mass of 8 kg. A resultant force of 32 N acts on it. What acceleration does the object experience?
Practise Newton's lawsForces in action
A force of 90 N is applied to a small piston with an area of 0.030 m². Using pressure = force ÷ area, what pressure is produced in the fluid?
Practise Forces in actionStatic and charge
A current of 3 A flows for 20 s. What charge flows past a point in the circuit?
Practise Static and chargeSimple circuits
A device is rated at 60 W and operates with a potential difference of 12 V across it. What current flows through the device?
Practise Simple circuitsMagnets and magnetic fields
A student plots the field around a bar magnet using a compass and iron filings. Which pair of observations correctly describes how the field changes from a point near the north pole to a point far to the side of the magnet?
Practise Magnets and magnetic fieldsUses of magnetism
A coil is connected to a galvanometer. A magnet is pushed in, held still inside the coil, then pulled out. During which stage or stages is a potential difference induced across the coil?
Practise Uses of magnetismWave behaviour
A wave has a period of 0.02 s. What is its frequency?
Practise Wave behaviourThe electromagnetic spectrum
How can an alternating current in an aerial produce radio waves?
Practise The electromagnetic spectrumWave interactions
A red apple is seen in white light. Why does the apple look red?
Practise Wave interactionsRadioactive emissions
Which statement correctly describes what happens when an inner electron is excited?
Practise Radioactive emissionsUses and hazards
Which statement describes contamination rather than irradiation?
Practise Uses and hazardsWork done
A 2.0 kg block of aluminium (specific heat capacity 900 J/(kg °C)) is heated and its temperature rises by 15 °C. A second identical block is heated by the same amount of energy, but it is made of a material with a specific heat capacity of 1800 J/(kg °C). By how much does the second block's temperature rise?
Practise Work donePower and efficiency
A battery-powered toy car stores 240 J of chemical energy. It transfers 90 J usefully to motion and the rest is wasted. Calculate the efficiency and the energy wasted.
Practise Power and efficiencyPhysics on the move
A cyclist travelling at 6 m/s brakes and comes to rest in about 2 s. Which value is the best estimate of the magnitude of the cyclist's deceleration?
Practise Physics on the movePowering Earth
What is the approximate potential difference of the UK domestic mains supply?
Practise Powering EarthBeyond Earth
A satellite is in a circular orbit. Explain why the gravitational force changes its velocity but does no work on it, keeping its speed constant.
Practise Beyond EarthMaterials
A student measures the time for a pendulum to swing 10 times as 15.2 s. What is the period of one swing?
Practise MaterialsForces
A student wants to hang a series of known weights on a spring to see how the extension changes. Which apparatus allows the applied force to be measured directly?
Practise ForcesMotion
A runner covers 100 m in 20 s at a steady speed. Which calculation gives the runner's speed?
Practise MotionMeasuring waves
A student measures the volume of water in a measuring cylinder before and after placing a small object in it. The reading rises from 40 cm³ to 55 cm³. What is the volume of the object, and why is this method used?
Practise Measuring wavesEnergy
A student uses a force meter to pull a trolley 3.0 m along a bench with a steady horizontal force of 4.0 N. What is the work done by the pulling force?
Practise EnergyCircuit components
A student measures the current through a diode in forward bias as 0.020 A when the potential difference across it is 0.70 V. What is the resistance of the diode under these conditions?
Practise Circuit componentsSeries and parallel circuits
Two identical lamps are connected in parallel across a 6 V cell. What is the potential difference across each lamp?
Practise Series and parallel circuitsInteractions of waves
A student wants to measure how much ultrasound is reflected from a block of gel and from a block of metal. Which choice of apparatus is most suitable for detecting the reflected ultrasound in both materials?
Practise Interactions of waves
Practise all 980 practice questions and see your weak topics.
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