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Q. The total charge on the system of capacitance $C _1=1\, \mu F , C _2=2 \,\mu F , C _3=4 \,\mu F $ and $C _4=3\, \mu F$ connected in parallel is
(Assume a battery of $20 \,V$ is connected to the combination)

JEE MainJEE Main 2022Electrostatic Potential and Capacitance

Solution:

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Total charge $= q _1+ q _2+ q _2+ q _4$
$=1 \times 20+2 \times 20+4 \times 20+3 \times 20=200 \,\mu C$