Which statement about electromagnetic induction in a coil of wire is correct?
An electromotive force (e.m.f.) is induced when a magnet is held stationary inside the coil.
No e.m.f. is induced if the magnet and the coil are moved together at the same speed in the same direction.
The magnitude of the induced e.m.f. is independent of the speed at which the magnet is moved.
An e.m.f. is only induced when the magnet moves towards the coil, but not when it moves away.
275 exam-style questions on CIE IGCSE Physics 4.5 Electromagnetic effects, covering 4.5.1a Electromagnetic induction, 4.5.1b Direction of an induced e.m.f., 4.5.2 The a.c. generator, 4.5.3a Magnetic effect of a current and its applications, 4.5.3b Strength and direction of the field around wires and solenoids, 4.5.4a Force on a current-carrying conductor, 4.5.4b Force on beams of charged particles, 4.5.5 The d.c. motor, 4.5.6a Construction and operation of a transformer, 4.5.6b Turns ratio and current in a transformer, and 4.5.6c High-voltage transmission of electricity. Each one has a worked solution and a mark scheme showing where the marks go.