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13.1 Inducing a current

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Question 41

A position sensor has a coil fixed beside a track and a magnet attached to a trolley. The trolley moves along the magnet's axis between the same two marked positions in every trial; where the direction is reversed, it travels back between those same positions. The coil connections are unchanged. The sensor records a positive potential difference when the north pole moves towards the coil.

TrialPole facing the coilDirection of trolley movementSpeed of trolleyPeak induced potential difference
ANorthTowards the coil0.20 m/s+0.12 V
BNorthTowards the coil0.40 m/s+0.24 V

In trial C, the south pole faces the coil and the trolley moves away from the coil at 0.40 m/s.

Compare the peak induced potential difference in trial C with the peak induced potential difference in trial A.

[2]
Markscheme

13.1 Inducing a current Questions

  1. GCSE
  2. /Physics
  3. /13.1 Inducing a current

92 exam-style questions on Edexcel GCSE Physics 13.1 Inducing a current, covering 13.1.1 Producing an electric current by induction, 13.1.2 Factors affecting the induced potential difference, 13.1.3 Alternators and dynamos, and 13.1.4 Microphones and loudspeakers. Each one has a worked solution and a mark scheme showing where the marks go.

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