alleryStart learning →Why does a fuse protect a circuit from catching fire?
AIts wire melts and breaks the circuit
BIts wire cools and slows the current
CIts wire bends and blocks the current
DIts wire glows and warns the user
Answer & Solution
Correct answer: A. Its wire melts and breaks the circuit
1. An electric current heats up any resistor it passes through.
2. A fuse holds a thin wire made of metal with a low melting point.
3. If the current grows too large the wire heats up and melts.
4. The melted wire leaves a gap, so the circuit is broken and the current stops.
_Source: Siyavula Natural Sciences Grade 8 (CC BY 4.0), What are fuses?_
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