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MHT CET 2021 (22 Sep, Shift 1) · Combination of Capacitors

Combination of Capacitors question from MHT CET 2021 (22 Sep, Shift 1)

Q65MHT CET 2021 · 22 SEP · SHIFT 1Medium

Combination of Capacitors

In the given figure potential at point 'A' is 900 volt and point 'B' is earthed. What will be the potential at point 'P'?

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Answer: (c)

$C_2 \parallel C_3 = 8 + 4 = 12\ \mu\text{F}$ , in series with $C_1 = 6\ \mu\text{F}$ .
In series, voltage divides inversely to capacitance: $V_{PB} = 900\times\frac{6}{6+12} = 300$ V.
B is earthed, so $V_P = 300$ V.
So the answer is (c) 300 V.

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