Electricity and Magnetism
The circuit diagram shows a circuit with an a.c. supply, a diode and a resistor. Which diagram shows how...
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Motion, Forces and Energy
A ball is dropped onto a floor. Its speed just before hitting the floor is 3.0 m/s. Which change would...
Motion, Forces and Energy
A compressed spring projects a ball horizontally in a vacuum chamber. On the Earth, the ball reaches the...
Motion, Forces and Energy
An athlete with mass 70 kg trains by performing press-ups with a load on his back. The diagram shows the...
Waves
The diagram shows compressions and rarefactions in air as a sound wave moves from left to right. A...
Electricity and Magnetism
The diagrams show different particles moving through a magnetic field. Which particle experiences a...