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4.2 Uses of magnetism

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Question 26
H

Which single change would double the potential difference across the secondary coil of a transformer?

[1]
A

Doubling the number of turns on the primary coil

B

Halving the number of turns on the secondary coil

C

Halving the number of turns on the primary coil

D

Doubling the number of turns on both of the coils

Markscheme

4.2 Uses of magnetism Questions

  1. GCSE
  2. /Physics
  3. /4.2 Uses of magnetism

48 exam-style questions on OCR GCSE Physics 4.2 Uses of magnetism, covering 4.2.1 The motor effect, 4.2.2 Fleming's left-hand rule, 4.2.3 The force on a current-carrying conductor, 4.2.4 The electric motor, 4.2.5 Electromagnetic induction, 4.2.6 Alternators and dynamos, 4.2.7 How transformers work, 4.2.8 Transformer turns ratio, 4.2.9 Potential differences and turns in transformers, and 4.2.10 Microphones, loudspeakers and headphones. Each one has a worked solution and a mark scheme showing where the marks go.

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