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(D) An electric fuse is a safety device used in electrical circuits to protect appliances from damage due to excessive current.When a short circuit or

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use of fuse

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(D) An electric fuse is a safety device used in electrical circuits to protect appliances from damage due to excessive current.When a short circuit or overloading occurs,the current in the circuit increases significantly.This high current causes the fuse wire to heat up and melt due to the Joule heating effect $(H = I^2Rt)$.Once the fuse wire melts,the circuit breaks,preventing the flow of excessive current to the appliances and thereby protecting them from potential damage.

The most important safety method used for protecting home appliances from short circuiting or overloading is

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