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Class 10 Science Medium Mcq English Medium

According to Joule's law, the heat produced in a resistor is directly proportional to:

Question
According to Joule's law, the heat produced in a resistor is directly proportional to:
The resistance only
The square of the current, for a given resistance
The square root of current
The inverse of time
Answer
The square of the current, for a given resistance
Detailed Explanation
H = I^2 R t shows heat is directly proportional to the square of the current for a fixed resistance and time.
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