what do you mean by overloading ? state two ways by which a short circuit can be avoided.
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Answer:
FUSES and circuit breakers are ''safety valves'' built into electrical circuits to protect the wiring against overheating due to an overload or a short circuit. If excessive current flowed through the wires they would overheat and eventually start a fire.
A fuse or circuit breaker prevents this by ''blowing,'' or breaking the circuit, when an overload occurs. Fuses screw into threaded sockets inside the fuse box. The fuses contain a thin strip of metal that melts if the current (or amperage) flowing through that circuit exceeds the amount for which that fuse is rated. Circuit breakers act in much the same way, but they can be reset when they blow - unlike a fuse, which must be replaced.
Circuit breakers look like wall switches but contain sensing devices.