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An electric kettle of 7.0 ohm resistance containing 500cm3 of water at 10 degrees Celsius is connected to the110 V supply. If 10% of the electrical energy is wasted byimperfect insulation, calculate how long it takes to convert allthe water into steam. (Latent heat of vaporization of water = 2.26x 106 J/kg and its specific heat is 4189 J/kg/K).

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