Short circuits and earth wires
Quiz by Oak National Academy: GCSE Physics AQA Foundation
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6 questions
Show answers
- Q1Some electrical appliances have two layers of electrical insulation: the plastic around the wires, and an insulating outer casing. This is called ______ insulation.Users enter free textType an Answer30s
- Q2The diagram shows three electric circuits. How many of these have a short circuit?onenone of themall of themtwo30s
- Q3Which of the following statements about a circuit breaker are correct?Users sort answers between categoriesSorting30s
- Q4When does current flow in the earth wire of an appliance that has a metal outer casing?whenever the appliance is runningif the live wire comes loose and touches the metal casingif the earth wire comes loose and touches the metal casingalways, whether the appliance is switched on or off30s
- Q5Which of the following is the earth wire of an appliance connected to?Users sort answers between categoriesSorting30s
- Q6Which of the following is the purpose of a fuse?It creates a short circuit.It is used as a switch to turn a circuit on and off.It provides a low resistance path for current to flow to earth.It breaks the circuit if the current is too large.30s
