Tag: joule's law of heating

Questions Related to joule's law of heating

Heat produced by the resistance R is:

physics effects of electric current joule's law of heating thermal effect of electric current heating effect of electric current

  1. $\displaystyle \frac { VIt }{ 4.2 } $

  2. $\displaystyle \frac { W }{ J } $

  3. $\displaystyle \frac { { i }^{ 2 }Rt }{ 4.2 } $

  4. All

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Correct Option: D
Explanation:

From Joule's Law of heating-


Heat produced$=H=I^2Rt$

Now, $V=IR$

$\implies H=(IR)It=VIt$

And, $I=\dfrac{V}{R}$

$H=I^2Rt=\dfrac{V^2}{R^2}Rt=\dfrac{V^2}{R}t$