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4.5 Electromagnetic effects

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Question 73

The transformer in an inverter is used to change an input voltage of 12 V to an output voltage of 240 V.

The transformer has 100 turns on the primary coil.

Which type of transformer is it and how many turns does the transformer have on the secondary coil?

A

Step-up, 555 turns

B

Step-up, 200020002000 turns

C

Step-down, 555 turns

D

Step-down, 200020002000 turns

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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