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  4. In an electrical circuit, a battery is connected to pass 20 C of charge through it in a certain given time. The potential difference between two plates of the battery is maintained at 15 V. The work done by the battery is J

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Q. In an electrical circuit, a battery is connected to pass $20 \,C$ of charge through it in a certain given time. The potential difference between two plates of the battery is maintained at $15\, V$. The work done by the battery is ____$\,J $

JEE MainJEE Main 2021Electrostatic Potential and Capacitance

Solution:

Work done by battery $= Q (\Delta V )$
$\Rightarrow 20 \times 15=300 \,J$
$\therefore $ Ans. 300