alleryStart learning →Joule's law of heating states that the heat produced in a resistor is
A$H = IRt$
B$H = I^2R/t$
C$H = IR^2t$
D$H = I^2Rt$
Answer & Solution
Correct answer: D. $H = I^2Rt$
1. The heat produced depends on current, resistance and time.
2. Joule's law: $H = I^2Rt$ (joules), where I is current, R resistance, t time.
3. This is why high-current, high-resistance elements heat up the most.
_Source: Karnataka SSLC (KSEEB) Class 10 Science, Ch12 'Electricity', §12.6 (Joule's law)_
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