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7.2 The motor effect

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Question 10

In a moving-coil meter, a force on a current-carrying side of the coil moves a pointer. In a prototype meter, this side of the coil is parallel to the magnetic field. It is redesigned so that the side is at right angles to the field. The current, magnetic flux density and length of conductor in the field are unchanged. What is the change in the size of the force on this side of the coil?

[1]
A

It increases from zero to the greatest possible value

B

It increases from zero but remains below the greatest possible value

C

It remains zero because the current has not been increased

D

It decreases from the greatest possible value to zero

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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