Question

give meaning of the trems short circuiting and overloading in an electric circuit

Answer 1

Short circuiting is when the live wire and the neutral wire come in direct contact with each other. This is caused when the insulation cover gets worn off or torn.

Over loading is caused when many high power rated devices are operated at the the same time or are connected to the same socket.

These may lead to fire accidents.
(many times you might have observed that when you connect many electrical appliances to the same socket that socket cannot be used later or maybe that has some black mark or patch that is due to overloading!)

I hope this helps.

Answer 2

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Electrical circuits are designed to handle a limited amount of electricity. An overload occurs when you draw more electricity than a circuit can safely handle. If there were no breaker in the circuit, an overload would cause the circuit wiring to overheat, which could melt the wire insulation and lead to a fire.