State three factors on which the heat produced by an electric current depends.
How does it depend on these factors?
Answers
When a current flows through a conductor, heat energy generates in the conductor. The heating effects of electric current depend on three factors:
1) The resistance of the conductor. A higher resistance produces more heat.
2) The time for which the current flows. The longer the time the amount of heat production is high.
3) Higher the current the amount of heat generation is also large.
(i) the heat generated in the conductor is directly proportional to the square of the current(I) flowing through it , when resistance and time is constant
(ii) the heat generated in the conductor is directly proportional to the resistance (R) of the conductor when current through the conductor is constant for a constant time ,
(iii) the heat generated in the conductor is directly proportional to the time (t) during which the current (I) flows through the circuit for a certain time t