An electric kettle takes 4A current at 220 V. How much time will it take to boil 1kg of water from temperature $20^{\circ}C$ ? The temperature of boiling water is $ 100^{\circ}C$. - Clay6.com, a Free resource for your JEE, AIPMT and Board Exam preparation

An electric kettle takes 4A current at 220 V. How much time will it take to boil 1kg of water from temperature $20^{\circ}C$ ? The temperature of boiling water is $ 100^{\circ}C$.

$\begin {array} {1 1} (1)\;4.2\: min & \quad (2)\;6.3\: min \\ (3)\;8.4\: min & \quad (4)\;12.6\: min \end {array}$