Question

What does a 5 A rating on a fuse mean?

• A. Fuse melts down if the current is less than 5 A.
• B. Fuse melts if the current is more than 5 A.
• C. Fuse allows a current only equal to 5 A through it.
• D. Fuse produces energy if current is less than 5 A.

Answer 1

The correct option is B 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.