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10.1 Circuits, charge and current

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Question 10

A small heating strip is used to prevent condensation on an instrument window. A voltmeter connected across the heating strip initially reads 7.5 V.

The control setting is changed. A steady current of 0.25 A then flows through the heating strip for 4.0 min. During this time, the heating strip transfers 360 J of energy.

Calculate the percentage change in the voltmeter reading after the control setting is changed.

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Markscheme

10.1 Circuits, charge and current Questions

  1. GCSE
  2. /Physics
  3. /10.1 Circuits, charge and current

94 exam-style questions on Edexcel GCSE Physics 10.1 Circuits, charge and current, covering 10.1.1 Structure of the atom, 10.1.2 Circuit diagrams and symbols, 10.1.3 Series and parallel circuits, 10.1.4 Potential difference and voltmeters, 10.1.5 Energy transferred, charge and potential difference, and 10.1.6 Current, ammeters and charge flow. Each one has a worked solution and a mark scheme showing where the marks go.

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