A current of $0.25 A$ is flowing through a filament of an electric bulb for $20 m i n$ . Find the amount of electric charge that flows through the circuit.

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Solution

A current $(i)$ is flowing through the filament of an electric bulb for time $t = 20 m i n$ If a net charge $Q$ , flows across any cross-section of a conductor in time $t$ , then the current $i$ , through the cross-section is, $i = \frac{Q}{t}$ $Q = i \times t = 0.25 \times 20 \times 60 = 300 C$

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