The heating element of an electric fire has a working

Last updated: 7/10/2022

The heating element of an electric fire has a working temperature of 750°C, at which it takes 1 kW when operating from a 250 V supply. When first switched on, it takes an initial current of 6.5 A when the air temperature is 20°C. Determine the temperature coefficient of resistance of the material at 0°C.