An electric current can produce a heating effect and a magnetic effect.
Which row shows the effect that a transformer uses and one application of a transformer?
| Effect used by a transformer | One application of a transformer | |
|---|---|---|
| A | Heating effect | Changing the voltage of an a.c. supply |
| B | Heating effect | Protecting a circuit from excessive current |
| C | Magnetic effect | Changing the voltage of an a.c. supply |
| D | Magnetic effect | Protecting a circuit from excessive current |
Row A
Row B
Row C
Row D
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.