a) State Joule’s law of heating.
b) An alloy of nickel and chromium is used as the heating element. Why?
Answers
Answered by
2
Answer:
A) Joule's law of heating states that, when a current 'i ' passes through a conductor of resistance 'r' for time 't' then the heat developed in the conductor is equal to the product of the square of the current, the resistance and time.
B) AN ALLOY OF NICKEL AND CHROMIUM IS USED AS A HEATING ELEMENT BECAUSE IT INCREASES THE ELECTRICAL RESISTANCE AT HIGH TEMPERATURES AS WELL AS IT MAKES THE ALLOY CORROSION RESISTANT IN WATER.
Similar questions