Question

15. In the given circuit, the electric potential of P will be
(1) 5 V
(2) 6 V
(3) 8 V
(4) 9V

Answer 1

Answer:

Electric potential at P will be 8 volt

Answer 2

the electric potential of P will be  9 V

Explanation:

Charge across Each capacitor would be same as in Series

Q = CV

Hence

V₁ * 3   =    V₂ * 1  = V₃ *  2

V₁ = 11 - P

Lets take Q potential  between 1 & 2

V₂ = P - Q

(11 - P ) * 3  = (P - Q) * 1  =  Q * 2

(P - Q) * 1  =  Q * 2

=> P = 3Q

(11 - P ) * 3  = (P - Q) * 1

=> (11 - 3Q)3 = 3Q - Q

=> 33 - 9Q  = 2Q

=> 11Q = 33

=> Q = 3

P = 3Q

=> P = 3*3  = 9

Hence the electric potential of P will be  9 V

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