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4.5 Electromagnetic effects

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Question 106

A transformer has 400 turns on its primary coil and 8000 turns on its secondary coil.

Connected in this way, for what purpose could this transformer be used?

A

to convert a 240 V240\text{ V}240 V a.c. mains supply to operate a 12 V12\text{ V}12 V device

B

to convert a 12 V12\text{ V}12 V d.c. supply to operate a 240 V240\text{ V}240 V tool

C

to convert a 12 V12\text{ V}12 V a.c. supply to operate a 240 V240\text{ V}240 V device

D

to convert a 4800 V4800\text{ V}4800 V d.c. supply to a 240 V240\text{ V}240 V supply

Markscheme

4.5 Electromagnetic effects Questions

  1. IGCSE
  2. /Physics
  3. /4.5 Electromagnetic effects

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.

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