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10.3 Electrical energy and power

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Question 7

A loudspeaker coil has a resistance of 8.0 Ω and carries a current of 0.50 A. During a test, the coil must dissipate no more than 600 J. What is the longest time, in minutes, that the test can last?

[1]
A

1.25 min1.25\ \mathrm{min}1.25 min

B

5.0 min5.0\ \mathrm{min}5.0 min

C

2.5 min2.5\ \mathrm{min}2.5 min

D

3.0 min3.0\ \mathrm{min}3.0 min

Markscheme

10.3 Electrical energy and power Questions

  1. GCSE
  2. /Physics
  3. /10.3 Electrical energy and power

105 exam-style questions on Edexcel GCSE Physics 10.3 Electrical energy and power, covering 10.3.1 The heating effect of an electric current, 10.3.2 Reducing energy transfer in wires, 10.3.3 Advantages and disadvantages of the heating effect, 10.3.4 Energy transferred by an electrical circuit, 10.3.5 Electrical power, and 10.3.6 Energy transfers in domestic devices. Each one has a worked solution and a mark scheme showing where the marks go.

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