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10.3 Electrical energy and power

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Question 5

A copper track on a circuit board is tested at a constant current. The test data are shown in the table.

Test quantityValue
Resistance of the track0.10 Ω
Duration of the test4.0 min
Greatest energy the track may dissipate216 J

What is the greatest current that can be used for the test?

[1]
A

23 A23\ \mathrm{A}23 A

B

9.0 A9.0\ \mathrm{A}9.0 A

C

3.0 A3.0\ \mathrm{A}3.0 A

D

0.95 A0.95\ \mathrm{A}0.95 A

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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