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12.3 The motor effect

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Question 35
H

A wire is perpendicular to a uniform magnetic field. The current is doubled and the length of wire in the field is halved. The magnetic flux density is unchanged. What happens to the force on the wire?

[1]
A

It remains unchanged.

B

It becomes four times as large.

C

It becomes twice as large.

D

It becomes half as large.

Markscheme

12.3 The motor effect Questions

  1. GCSE
  2. /Physics
  3. /12.3 The motor effect

86 exam-style questions on Edexcel GCSE Physics 12.3 The motor effect, covering 12.3.1 The motor effect, 12.3.2 Fleming's left-hand rule, 12.3.3 Force on a conductor, and 12.3.4 Electric motors. Each one has a worked solution and a mark scheme showing where the marks go.

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