A student investigates the induced potential difference across a solenoid (a coil of wire) using a bar magnet.
Under which of the following circumstances will the magnitude of the induced potential difference be the greatest?
The magnet is moved very slowly into the solenoid.
The magnet is held stationary inside the solenoid.
The magnet is moved very rapidly out of the solenoid.
The magnet is held stationary near one end of the solenoid.
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.