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

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Question 26
H

The current in a transmission cable is halved. The resistance of the cable is unchanged. What happens to the power wasted in heating the cable?

[1]
A

It falls to one quarter of its original value

B

It falls to one half of its original value

C

It rises to twice its original value

D

It rises to four times its original value

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)

40 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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