Complete the table below by choosing a suitable metal from the list for each electromagnet, transformer, or magnet part.
Each metal can be used once, more than once, or not at all.
| Part | Metal |
|---|---|
| Permanent bar magnet | _________________ |
| Transformer core | _________________ |
| Solenoid coils | _________________ |
| Electromagnet core | _________________ |
The primary coil of a transformer is connected to a power supply of 230 V230\text{ V}230 V a.c. The primary coil has 800800800 turns and the secondary coil has 160160160 turns.
Calculate the output voltage of the secondary coil.
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.