A bar magnet is positioned near a solenoid (coil of wire). In which of the following situations will an electromotive force (e.m.f.) not be induced in the solenoid?
Moving both the solenoid and the magnet towards each other, each at a constant speed of 2 m/s2\text{ m/s}2 m/s.
Moving both the solenoid and the magnet in the same direction, each at a constant speed of 3 m/s3\text{ m/s}3 m/s.
Keeping the solenoid completely stationary while moving the magnet away from it at a constant speed of 5 m/s5\text{ m/s}5 m/s.
Keeping the magnet completely stationary while moving the solenoid away from it at a constant speed of 4 m/s4\text{ m/s}4 m/s.
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.