What should be the characteristics of an electric-fuse wire?

Correct option is D

Ans. (d)
An electric fuse wire should have a low melting point and high specific resistance to ensure it breaks the circuit quickly in case of an overload, protecting the system from damage.
Information Booster
1. Materials like lead-tin alloys are commonly used for fuse wires.
2. The low melting point ensures the fuse melts easily, stopping excess current.
3. High specific resistance allows the fuse to heat up quickly.
Additional Knowledge
· High melting point (Option a/c): Unsuited for fuse wires as they won’t break easily.
· Low resistance (Option b): This would delay the response time, reducing efficiency.
· Correct Combination (Option d): Ensures fast and safe circuit protection.