12Medium
0/5

A delicate copper suspension wire within a high-precision seismic galvanometer experiences a magnetic force due to a nearby permanent magnet assembly.

The details of this setup are as follows:

  • Magnetic force on the wire, F=7.2×10−5 NF = 7.2 \times 10^{-5}\text{ N}F=7.2×10−5 N
  • Magnetic flux density, B=120 mTB = 120\text{ mT}B=120 mT
  • Current in the wire, I=4.0 mAI = 4.0\text{ mA}I=4.0 mA
a.

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

[4]
b.

State one assumption made regarding the relationship between the wire 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.

PreviousNext

The motor effect Questions

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