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Youssef investigates electrical circuits. He uses a cell, a switch and a lamp, with an ammeter and a voltmeter to measure the current through the lamp and the voltage across it. What is the hazard in this investigation, and how could you reduce it?
Youssef observes that the lamp gets hot when a current passes through the lamp. Suggest one thing Youssef can do to make his investigation safe.
[1 mark]
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