Explain the role of fuse in series with any electrical appliance in an electric circuit. Why should a fuse with a defined rating for an electric circuit not be replaced by one with a larger rating?
1 Answer
Fuse wire is a safety device connected in series with the live wire of the circuit. It has high resistivity and low melting point. It melts when a sudden urge of large current passes through it and disconnects the entire circuit from the electrical supply. But, in case if we use a larger rating instead of a defined rating, then it will not protect the circuit as the high current will easily pass through it and it will not melt.
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