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Question

what is a fuse ?

A
Over current protection
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B
low resistance and high melting point wire.
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C
low resistance and low melting point wire.
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D
high resistance and low melting point wire.
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Solution

The correct options are
A Over current protection
D high resistance and low melting point wire.
Fuses are safety devices that are 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 a fire. To prevent electrical overloads, fuses are designed to trip or blow, stopping the flow of current to the overloaded cable.
Fuse is a piece of wire of a material with a very low melting point. When a high current flows through the circuit due to overloading or short circuit, the wires gets heated and melts. As a result, the circuit is broken and current stops flowing.

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