The maximum current that flows through a fuse wire before it blows out varies with its radius as

The maximum current that flows through a fuse wire, before it blows out, varies with its radius ‘r’as

(A): However long a fuse wire may be, the safe current that can be allowed is the same through it. (R): The safe current that can be allowed to pass through a fuse wire depends on the radius of wire.

If a current of 0.5 ampere flows through a metallic wire for two hours, then how many electrons flow through the wire?

A time wire with a circuit-sectional radius of 0.02mm blows with a current of 5 ampere for what current another fuse wire made from the same material with cross-section radius of 0.04 mm will blow?

If a current of one ampere flows through a metal wire for one hour, how many electrons would flow through the wire?