Correct Answer - Option 1 : Charge
Resistance Heating:
When current passes through a resistance, power loss takes place, which appears in the form of heat.
Power loss = I2 R = V I = V2 / R watt
Where,
I is the current
V is the voltage
R is the resistance
- All the electrical energy given to a resistance heating element will be converted into heat energy.
- The loss of energy takes place only in transferring heat from element to charge or load.
- The resistance heating is further classified as
(1) Direct Resistance Heating
(2) Indirect resistance heating
(3) Infrared or Radiant heating
In the direct resistance heating method, the maximum heat transfer takes place by radiation. In this method, the electric current is made to pass through the charge (or) substance to be heated.
This principle of heating is employed in salt bath furnace, electrode boiler and in resistance welding.
