Where do we use wires that melt quickly and break when large electric currents pass through?

The correct answer is (B) Electric Fuses

Explanation:
● Electric fuses contain a thin wire that melts quickly when excessive current flows through it.
● This melting breaks the circuit and protects electrical appliances from damage due to overload or short circuit.
● Thus, such wires are intentionally used in electric fuses for safety purposes.

Information Booster:
● Fuse wire is usually made of a low melting point alloy.
● Fuses are connected in series with the circuit.
● They prevent fire hazards caused by overheating.
● Fuse rating must match the current capacity of the circuit.
● Modern alternatives to fuses include MCBs (Miniature Circuit Breakers).

Additional Knowledge:
● Electric iron, kettle, and geyser are appliances, not safety devices.
● Overloading without a fuse can damage appliances permanently.
● MCBs automatically reset, unlike traditional fuses which need replacement.