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Out of the three fuses with current ratings 5A, 10A, 15A,

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Out of the three fuses with current ratings 5A, 10A, 15A, which one is to be connected in a geyser circuit marked 3kW, 220V? Give reason for your answer.

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Best answer

The current flowing through geyser

= (3 x 1000)/220 = 13.63A = 14A.

The rating of fuse should be just matching with the maximum current carried by the circuit. So the fuse rating should be of 15A.

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