The most important safety device method used for protecting electrical appliances from short-circuiting or overloading is

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Use of fuse

Use of stabilisers

Earthing

Use of electric metre

answer is A.

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Detailed Solution

The most important safety device method used for protecting electrical appliances from short-circuiting or overloading is the use of a fuse.
Fuses are the safety devices to be built into our electrical system. If there were no fuses and we operated too many appliances on a single circuit, the cable carrying the power for that circuit would get extremely hot, short circuit, and possibly start to fire. Fuses are designed to cut the flow of current to the overloaded cable.
It is a piece of wire with a very low melting point. The wires get heated and meltdown when a high current flows into the circuit due to an overloading or short circuit. As a result, the circuit is broken, and the current flowing stops. And the fuse should always be connected to the mains, and it must be on the correct value.

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