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7.3 Induced potential, transformers and the National Grid (HT only)

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Question 40

A metal rod rests across two parallel conducting rails and remains in contact with both rails. The rod can slide along the rails.

A constant magnetic field is perpendicular to the plane containing the rails and the rod. A resistor and a switch connect the rails at one end.

Four tests are carried out.

TestMotion of the rodSwitch
PStationaryClosed
QSliding along the railsOpen
RSliding along the railsClosed
SStationaryOpen

In which test does the resistor carry an induced current?

[1]
A

Test P only

B

Test R only

C

Test S only

D

Test Q only

Markscheme

7.3 Induced potential, transformers and the National Grid (HT only) Questions

  1. GCSE
  2. /Physics
  3. /7.3 Induced potential, transformers and the National Grid (HT only)

96 exam-style questions on AQA GCSE Physics 7.3 Induced potential, transformers and the National Grid (HT only), covering 7.3.1 Induced potential (HT only), 7.3.2 Uses of the generator effect (HT only), 7.3.3 Microphones (HT only), and 7.3.4 Transformers (HT only). Each one has a worked solution and a mark scheme showing where the marks go.

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