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Explain the application of heating effec...

Explain the application of heating effect of electric current in a fuse.

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A fuse protects electrical circuits and appliances by stopping the flow of electric current when it exceeds a specified value. For this, it is connected in series with the applience (or circuit) to be protected ,. A fuse in a piece of wire made of an alloy of low melting point (e.g, an alloy of lead and tin). If a current larger than the specified value flows through the fuse, its temperature increases enough to melt it. Hence, the circuit breaks and the appliance is protected from damages.
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