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7.2 The motor effect

7.2 The motor effect

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Question 10

An electrical cable suspended in an industrial testing rig experiences a magnetic force due to a nearby electromagnet.

The details of the setup are as follows:

  • Magnetic force on the cable, F=0.024 NF = 0.024\text{ N}F=0.024 N
  • Magnetic flux density, B=160 μTB = 160\ \mu\text{T}B=160 μT
  • Current in the cable, I=30 AI = 30\text{ A}I=30 A
a.

Calculate the length, lll, of the cable that is within the magnetic field. Show your working and state the unit.

[4]
b.

State one assumption made regarding the relationship between the cable and the magnetic field to perform this calculation.

[1]
Markscheme

7.2 The motor effect Questions

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

13 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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