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7.2 The motor effect

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Question 14

Four coil assemblies are being tested for use in an automatic fire-door holder. The same type of insulated wire is used for each coil.

Coil assemblyNumber of turnsMaterial inside the coilCurrent in A
J400plastic0.20
K400iron0.20
L800plastic0.20
M400plastic0.40

Which coil assembly produces the weakest magnetic field?

[1]
A

K

B

M

C

J

D

L

Markscheme

7.2 The motor effect Questions

  1. GCSE
  2. /Physics
  3. /7.2 The motor effect

90 exam-style questions on AQA GCSE Physics 7.2 The motor effect, covering 7.2.1 Electromagnetism, 7.2.2 Fleming's left-hand rule (HT only), 7.2.3 Electric motors (HT only), and 7.2.4 Loudspeakers (HT only). Each one has a worked solution and a mark scheme showing where the marks go.

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