An electric iron of resistance 20 Ω takes a current of 5 A. Calculate the heat developed in 30 s.

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An electric iron of resistance 20 Ω takes a current of 5 A. Calculate the heat developed in 30 s.

The Joule’s law of heating, which is provided by the equation, may be used to compute the quantity of heat created.

VIt = H

We obtain by substituting the variables in the preceding equation:

H = $1.5\times{{10}^{4}}$ J

The heat generated by the electric iron in 30 seconds is $1.5\times{{10}^{4}}$ J

i

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