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Electric Energy and Power

Question

A current of 0.4 A flows through an electric bulb working at 230 V. What is the power of the bulb?

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Solution

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According to the question,
$$V= 230 \ V$$
$$I= 4 \ A $$
$$P= VI$$
$$P= 230 \times 4 = 92 \ W$$
V=230 V

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