Explain the role of fuse in series with any electrical appliance in an electric circuit.Why should a fuse with defined rating for an electric curcit not be replaced by one with a larger heating?
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.