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7.2 The motor effect

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Question 7
F

A long straight wire carries a current. A point P is a fixed distance from the wire. Which change increases the strength of the magnetic field at P?

[1]
A

Winding the wire into a coil of 20 turns placed far away from P

B

Reversing the direction of the current, keeping its size the same

C

Increasing the current in the wire, keeping its direction the same

D

Using a longer wire carrying the same current in the same direction

Markscheme

7.2 The motor effect Questions

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

39 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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