CBSE Class 10 Answered
calculate the ampere rating of the fuse wire required with an electric kettle of rating 1kw,220v when operated on a 110v supply
Asked by akshatkumarpug | 19 Dec, 2023, 01:21: PM
Expert Answer
If the power rating of coil P = 1 kW when it is operating on V = 220 V voltage , then its resistance R is calculated from the relation
If the heater coil operates on 110 V voltage , then maximum current I drawn by heater coil is
I = voltage / resistance = ( 110 / 48.4 ) A = 2.273 A
Hence Ampere rating of fuse should be 2.3 A
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