A bar magnet is held fixed in a vertical position with its North pole pointing upwards. A coil of copper wire is wrapped around a hollow tube that can slide up and down over the magnet. The coil is connected to a sensitive centre-zero galvanometer.
What does the galvanometer show when the coil is repeatedly and continuously moved up and down over the fixed magnet?
A reading that constantly alternates from left to right and right to left
A steady reading to the left
A steady reading of zero
A steady reading to the right
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.