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JEE Main 2020 (3 Sep, Shift 1) · Combination of Capacitors

Combination of Capacitors question from JEE Main 2020 (3 Sep, Shift 1)

Q74JEE Main 2020 · 3 SEP · SHIFT 1Medium

Combination of Capacitors

In the circuit shown in the figure, the total charge is 750 $\mu$ C and the voltage across capacitor C2 is 20 V. Then the charge on capacitor C2 is:

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Answer: (c)

$C_1$ carries the total charge, $750\ \mu\text{C}$ , and so does the $C_2 \parallel C_3$ pair together.
$C_2$ and $C_3$ are in parallel at 20 V: $Q_3 = 8\times 20 = 160\ \mu\text{C}$ .
$Q_2 = 750 - 160 = 590\ \mu\text{C}$
So the answer is (c) 590 $\mu$ C.

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