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10.3 Electrical energy and power

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Question 13

An LED desk lamp is connected to the 230 V mains supply. Over a period of 4 minutes4\text{ minutes}4 minutes, it transfers 11 040 J11\,040\text{ J}11040 J of energy.

Calculate the current in the LED desk lamp.

Use the equation:

I=EV×t I = \frac{E}{V \times t} I=V×tE​
[3]
Markscheme

10.3 Electrical energy and power Questions

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

31 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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