Standard Science Primary 5 Systems

What is the purpose of a fuse in an electrical circuit?

A To increase the brightness of the bulbs.
B To break the circuit if the current becomes too high.
C To store extra electricity.
D To provide more power to the circuit.
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Worked Solution

Step 1: Fuses contain a wire that melts at high current. Step 2: When the wire melts, the circuit becomes open. Step 3: This prevents overheating and fires.

Correct answer: To break the circuit if the current becomes too high.

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