Question
Download Solution PDFIf the current passing through a heater is tripled by keeping resistance and time of the current flow unaltered, then the heat produced is:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is 'Becomes nine times'.
Key Points
- Hence the heating effect produced by an electric current, I through a conductor of resistance, R for a time, t is given by H = I2Rt.
- This equation is called Joule’s equation of electrical heating.
- Heat produced in the resistor H = I2RT
H = I2RT
- Heat produced after current is tripled.
- So Given Inew = 3I
Hnew = Inew2RT
Hnew = (3I)2RT
Hnew = 9 I2RT
Hnew = 9 H
So, heat produced in the resistor becomes 9 times if the current in the resistor is tripled.
Last updated on Jul 11, 2025
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