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Physics CBSE Live product
Class 10 (2026-27)
Electricity
Heating effect of a current
2.
Joule's law of heating
Question:
2
m.
Choose the best answer below:
1
.
Which expression correctly represents Joule's law of heating?
\(H\ =\ I^2Rt\)
\(H\ =\ VIt^2\)
\(H\ =\ IRt\)
\(H\ =\ I^2Vt\)
2
.
If the current and resistance remain unchanged but the time is doubled, the heat produced will
remain unchanged
become four times
double
become half
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