What must be the efficiency of an electric kettle marked 500 W, 230 V, if it was found to bring 1 kg of water at 15 to boiling point in 15 min? (Given specific heat capacity of water J/kg℃) |
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a) |
79% |
b) |
81% |
c) |
72% |
d) |
69% |

What must be the efficiency of an electric kettle marked 500 W, 230 V, if it was found to bring 1 kg of water at 15 to boiling point in 15 min? (Given specific heat capacity of water J/kg℃) |
|||||||

a) |
79% |
b) |
81% |
c) |
72% |
d) |
69% |

1 Answer

127 votes

Heat produced J Where, watt J Heat absorbed by water Efficiency |

127 votes

127