ELECTRICAL POWER
2 marks · EasyExplain why the wires inside an electric oven are designed to have high resistance.
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High resistance causes the wires to get hot when current flows, which transfers energy as heat to cook food.
Also accept: The high resistance makes the wires heat up, providing the heat needed for cooking.
Common mistakes: Low resistance wires get hotter.; High resistance makes the oven colder.
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Marking points
M1 · 1 mark · States that high resistance makes the wire become hot when current flows.
A1 · 1 mark · Links this to providing heat for cooking or transferring energy as heat.
Worked solution
High resistance causes the wires to become hot when electric current passes through. This heat is used to cook food in the oven.