Question

define short circuit? how can it be prevented?

Answer 1

If a bare live wire and neutral wire touch each other, come very close to each other then a large number of current flows through the circuit the resistance of the circut decreases and such tests short circuit takes place. A fuse wire can be used to prevent it.

Answer 2

here's your answer

how to prevent short-circuit:

Use cartridge fuse or Miniature Circuit Breaker.

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