Question

Technician A says if a fuse burns out when a switch is turned on, a short circuit is present before the switch. Technician B says if a fuse burns out when a switch is turned on, a short circuit is present after the switch. Who is correct?

Answer 1

Answer:

Technician B

Explanation:

This can be explained as a fuse is a protective device which blows in order to protect the circuit and the equipment from short circuiting.

Short circuit is a condition where a very heavy current flow through the line with no low line impedance which is not the intended path for the current to flow.

Thus when heavy current flows through a fuse it blows out thus disconnecting the path for the current flow.

Therefore, if a fuse burns out when switch is on, short circuit is present after the switch