An electrical device requires an alternating voltage of 6.0 V to operate normally. The mains supply voltage is 240 V. Which transformer provides the correct output voltage to enable the device to operate normally when connected to the mains supply?
Number of turns on primary coil = 600600600, number of turns on secondary coil = 24 00024\,00024000
Number of turns on primary coil = 600600600, number of turns on secondary coil = 2 4002\,4002400
Number of turns on primary coil = 24 00024\,00024000, number of turns on secondary coil = 600600600
Number of turns on primary coil = 2 4002\,4002400, number of turns on secondary coil = 600600600
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.