Question

Explain the role of fuse in series with any electric appliances in an electric circuit. why should a fuse with defined rating for a circuit not be replaced by one with a larger rating

Answer 1

HEY DEAR ...

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A fuse is connected in series to prevent any short circuit or to discontinue the flow of charges in the circuit due to overloading.

If excess current passes through circuit, it breaks the circuit and protects the appliance from getting damaged. 

A fuse is rated for a specific value of current. It means it is designed to break the flow if the current exceeds the required value. If you put a fuse with a higher rating, It would allow more current in the circuit.The current in the circuit can now exceed the limit which was set earlier and can damage the appliance.

HOPE , IT HELPS ...

Answer 2

There is an important role of fuse in an electric circuit. If there is short circuit or high voltage or variable voltage which causes damage to the appliances and instrument connect in curcit . So to prevent this a fuse is connected as it has low melting point conductor which melts down in such cases.there should be a fuse of definite rating. Of fuse according. To appliances so that there should be a limit of voltage supply and on exceeding it would melt ...I hop you understood my points....,good luck