Question

Assertion (A): When the electric current through the fuse exceeds a certain limit, the fuse wire melts and breaks.
Reason (R): A fuse wire has low melting point.

• A. Both A and R are true and R is the correct explanation of A.
• B. Both A and R are true but R is NOT the correct explanation of A
• C. A is true but R is false.
• D. A is false but R is true.

Answer 1

The correct option is A Both A and R are true and R is the correct explanation of A.

When the current flowing through the fuse wire exceeds the safety limit, then it breaks the circuit.
A fuse is a small piece of wire connected with the electrical appliances .
This wire is chosen such that it melts when excess current passes through the electrical appliance. Fuse wire has low melting point.
An electric fuse is a safety device to prevent damage to an electrical circuit when excessive current flows through it.

Therefore, both A and R are true and R is the correct explanation of A.