Electromagnetic Induction

A piece of wire of resistance is cut into n equal parts. These parts are then connected in parallel. If the equivalent resistance of the parallel combination is , then is

There is a current of in a wire of area of cross-section. If the number of free electrons per cubic metre is , then the drift velocity is

An electric immersion heater of is immersed in water. After the water has reached a temperature of how much time will be required to produce of steam?

The temperature (T) dependence of resistivity (p) of a semiconductor is represented by