Question

EASY 8 POINTS
How does a fuse protect a toaster?

A. When the current is too high, a metal strip in the fuse melts and opens the circuit.
B. When the current is too high, a resettable switch opens the circuit.
C. When the resistance is too high, a resettable switch opens the circuit.
D. When the resistance is too high, a metal strip in the fuse melts and opens the circuit.

Answer 1

It's A. When the current is too high the metal strip melts and opens the circuit. :)

Answer 2

The fuse breaks the circuit if a fault in an appliance causes too much current flow. This protects the wiring and the appliance if something goes wrong. The fuse contains a piece of wire that melts easily. If the current going through the fuse is too great, the wire heats up until it melts and breaks the circuit.