1000 W to 250 V of electric kettle is used to bring water at 20°c to its boiling point.If kettle is used for 11 mins and 12 secs, calculate:(1) resistance (2) current and (3) mass of water in the kettle ? (PLS ANS URGENTLY I Request you)?
The electric kettle is rated 1000W 250V.This means if it is connected across 250V supply voltage, it will spend electrical energy @ 1000J/s.
(1) If its resistance be
(3) Let the mass of water be mkg.The heat energy required to raise its temperature from
To raise the temperature Power is supplied for t = 11 min 12s or 672s.
So energy supplied
If total energy goes only to increase the temperature of water ,then