What does a 5 A rating on a fuse mean?

Fuse melts down if the current is less than 5 A.

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Fuse allows a current only equal to 5 A through it.

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Fuse produces energy if current is less than 5 A.

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Fuse melts if the current is more than 5 A.

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Solution

The correct option is D Fuse melts if the current is more than 5 A.
Fuses are used to break the circuit, once a current greater than the rating is passed through it. If a fuse is rated at 5 A, the fuse melts above a current of 5 A, hence breaking the circuit.

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