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Question

Find the capacitance between P and O, if each capacitor has capacitance C.


A
3C
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B
8C
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C
2C
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D
6C
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Solution

The correct option is C 2C
By symmetry, clearly A, B, C, D are equipotential points.

VA=VB=VC=VD

Redrawing the circuit,


So, the equivalent capacitance across P and O,

Ceq=(4C)(4C)(4C)+(4C)

Ceq=2C

Hence, option (a) is correct answer.
Why this Question :
This question will help the students to learn the approch of redrawing a complex circuit by analysing the equipotential points in a circuit.

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