Question

Name the safety device in house give its principle

Answer 1

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There are various safety devices used in houses to prevent damaging of machines connected to a high voltage light. Some of them are FUSE, MCB, etc.

The principle used in Fuses a is the HEATING EFFECT OF ELECTRICITY.

MCBs works when the amount of current in the line exceeds the rated current magnitude of a MCB, then it switches itself off and thus breaks the circuit.