Explain how the fuse melts when a short circuit appliance gets earthed.

Q. In our home, if a bulb gets short circuited then the appliance connected in the circuit just next to the bulb will also get short circuited.

Q. When a short-circuit takes place, the fuse wire melts and breaks the electric circuit.

Q. Question 12
The most important safety method used for protecting home appliances from short circuiting or overloading is

(a) earthing
(b) use of fuse
(c) use of stabilizers
(d) use of electric meter​​​​​​​

Q. (a) How should the electric lamps in a building be connected so that switching on or off in a room has no effect on other lamps in the building? State one or more advantage of such an arrangement.
(b) Which effect of current is utilised in the working of an electric fuse? How does an electric fuse work?
(c) What is the usual colour of the insulation of (i) earth wire, and (ii) live wire?
(d) When does an electric short circuit occur? What harm can do it?
(e) Explain the purpose of earthing an electrical appliance.

Q.

(a) The earthing of an electric appliance is useful only if the fuse is in the live wire. Give the reason.

(b) Name the part of the appliance which is earthed.