Question

If a heater coil is cut into two equal parts and only one part is used in the heater, the heat generated will be

Answer 1

Heat generated will be doubled.

By cutting, length is halved. therefore, resistance will be halved.

We know,,

 $H=I^{2} Rt$.............(1

Current is not given... But, We also know that :

$I=V/R$ ................(2

Hence,

$H=V^{2} t/R$

As, Heat and Resistance are inversely proportional to each other. So, heat will be  doubled.