A heating coil of 2000 watt is immersed in an electric kettle how much time will it take in raising - Physics - Current Electricity

Question

A heating coil of 2000 watt is immersed in an electric kettle how
much time will it take in raising the temperature of 1 litre of
water from 4 degree Celsius to 100 degree Celsius only 80% part of
the thermal energy produced is used in raising the temperature of
water?

Shobhit Mittal · Accepted Answer

Dear Student,

P=2000 W, 1 litre from 4 degree to 100 degree 
heat capacity =4
18 joule /gm heat require =4
18*1000*100-4=401280 Jheat given in one second =0
8*2000=1600 J time required=4012801600=250
8 sec Regards

A heating coil of 2000 watt is immersed in an electric kettle.how much time will it take in raising the temperature of 1 litre of water from 4 degree Celsius to 100 degree Celsius. only 80% part of the thermal energy produced is used in raising the temperature of water?