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13.2 Transformers and the National Grid

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Question 10

During one session, a control console in a broadcast studio receives 36 kJ of energy through a transformer. The transformer is 100% efficient. Its primary is connected to a 240 V supply and carries a current of 0.50 A.

How long does the session last?

[1]
A

0.30 s0.30\ \mathrm{s}0.30 s

B

300 s300\ \mathrm{s}300 s

C

75 s75\ \mathrm{s}75 s

D

150 s150\ \mathrm{s}150 s

Markscheme

13.2 Transformers and the National Grid Questions

  1. GCSE
  2. /Physics
  3. /13.2 Transformers and the National Grid

108 exam-style questions on Edexcel GCSE Physics 13.2 Transformers and the National Grid, covering 13.2.1 Transformers and induction, 13.2.2 The transformer turns-ratio equation, 13.2.3 The National Grid, 13.2.4 The transformer power equation, and 13.2.5 Advantages of high-voltage transmission. Each one has a worked solution and a mark scheme showing where the marks go.

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