What are the various reasons for excessive current in electric circuits? What can we do to prevent them? [3 MARKS]
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Reason: 2 Marks Preventive measure: 1 Mark
The various reasons due to which there may be excessive current in electric circuits are:
1) Direct touching of wires. This may happen if the insulation on the wires has come out due to wear and tear. This may cause a short circuit. A short circuit can result in a very high current flowing through the circuit. 2) Another reason for excessive current can be the connection of many devices to a single socket. This may cause overload in the circuit.
We can prevent excessive current in electric circuits by using a fuse, or MCBs.