Question

Which of the following are the characteristics of a fuse wire?

• A. Low melting point
• B. Connected in parallel in a circuit
• C. Safety device
• D. Circuit breaker

Answer 1

Answer: (A), (C), (D)

The correct options are
A Low melting point
C Safety device
D Circuit breaker

Fuse is a safety device, which is connected in series in an electric circuit. It has a low melting point. When current through the circuit exceeds a certain limit, due to the joule's heating effect, the fuse wire melts. As it is connected in series, the circuit is disconnected, and hence, no current will flow through the circuit. In this way, the electric devices or appliances are protected from harmful amounts of current.