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12.3 The motor effect

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Question 25
H

A horizontal wire in a magnetic field is free to move vertically. Its weight is 0.060 N. At a current of 2.0 A, the upward magnetic force just balances its weight. The current is increased to 5.0 A in the same direction. The field and wire position are unchanged. What is the resultant force on the wire?

[1]
A

0.090 N0.090\ \mathrm{N}0.090 N downwards

B

0.150 N0.150\ \mathrm{N}0.150 N upwards

C

0.090 N0.090\ \mathrm{N}0.090 N upwards

D

0.210 N0.210\ \mathrm{N}0.210 N downwards

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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