Question

$\left(a\right)$ How does use of fuse wire protect electrical appliances?
$\left(b\right)$ Name factors on which resistance depend?

Answer 1

An electrical fuse works by breaking the circuit when there is a fault in an appliance that causes too much current to flow. The wire within the circuit melts due to the heat generated when the current going through the circuit is too great.

In this way,fuse wire protect electrical appliances.

Resistance depends up on Resistivity, length of wire and its area of cross section.

$R=\frac{\rho l}{A}$