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12.3 The motor effect

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Question 28

A magnetic actuator contains a straight section of aluminium conductor. A 6.0 cm length of the conductor is inside a uniform magnetic field and is at right angles to the field.

The magnetic flux density is 0.25 T0.25\ \text{T}0.25 T. The actuator requires a magnetic force of 0.045 N.

Calculate the current in the conductor.

Use the equation

F=B×I×lF = B \times I \times lF=B×I×l

[3]
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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