Heat is generated continuously in an electric heater but the temperature of its element becomes constant after some time. Why?
Answers
When the temperature of the heater becomes greater than the temperature of the surrounding, some of the heat is lost to the surroundings in the form of thermal radiations. After some time, the rate at which heat is being produced becomes equal to the rate of which heat is lost. Hence, the temperature of the element becomes constant.
Due to the electrical resistance,a constant heat is produced by the electricial heater's conductive substance.
But,at some point the heater's conductive substance reaches a constant temperature, although heat is constantly generating from it.
It happens, because at that point the surrounding's temperature and the temperature of the heater ,reaches in a special temperature equilibrium.
This also prevents the unwanted melting of the heater conducting substance.