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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]

The motor effect Questions

Practise AQA GCSE Physics The motor effect with exam-style questions for Foundation and Higher tier. 25 questions covering Electromagnetism, Fleming's left-hand rule (HT only), Electric motors (HT only), and Loudspeakers (physics only) (HT only), matched to the AQA GCSE Physics (8463) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.

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The motor effect Questions

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