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10.3 Electrical energy and power

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Question 7

An engineer tests a miniature heating element designed for a microfluidic thermal cycler.

When connected to a 12.0 V DC power supply, the current in the heating element is 450 mA.

Calculate the energy transferred to the heating element in 8 minutes8\text{ minutes}8 minutes.

Use an equation selected from the physics equations sheet.

[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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