Fuse is described as what?

Fuse is described as what?

• A. A bit of wire made of different material than the rest of the wiring
• B. A protective device that opens a circuit when cooled
• C. A device to regulate voltage
• D. A type of resistor

Answer: (A)

A fuse is a short piece of conductor that serves as a safety link in a circuit. The idea captured here is that it’s a bit of wire made from a material different from the rest of the wiring, chosen to melt or break the circuit when the current becomes too high. That melting behavior is what protects the rest of the circuit from damage. Why this works best: fuses are designed as a sacrificial link with a lower melting point, so excess current causes heating and the fuse opens the circuit. The other descriptions don’t fit: a device that opens when cooled isn’t how fuses operate, and voltage regulators or resistors have different roles in circuits.

A fuse is a short piece of conductor that serves as a safety link in a circuit. The idea captured here is that it’s a bit of wire made from a material different from the rest of the wiring, chosen to melt or break the circuit when the current becomes too high. That melting behavior is what protects the rest of the circuit from damage.

Why this works best: fuses are designed as a sacrificial link with a lower melting point, so excess current causes heating and the fuse opens the circuit. The other descriptions don’t fit: a device that opens when cooled isn’t how fuses operate, and voltage regulators or resistors have different roles in circuits.