Calculate the resistance of the appliance.

ICSE Class 10 Physics 2022 Paper

An appliance rated $440\,\mathrm{W}, 220\,\mathrm{V}$ is connected across $220\,\mathrm{V}$ supply.

Question : 33 of 45

Marks: +1, -0

Solution:

Let

P = VI

and

I = \;\frac{V}{R}

\because\;\; P = \frac{V^2}{R}

R = \;\frac{V^2}{P}

\;=\; \frac{220 \times 220}{440}

\;= 110 \Omega

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