Q21 and Q22:

21. 
For circuit the equivalent capacitance between points P and Q is ​

a   6 C                       b   4 C                             c   3 2 C                                 d   6 11 C




22. Four identical capacitors are connected in senes with a 10 V battery as shown in the figure. Potentials at A and B are ​

(a) 10 V, 0 V                    (b) 7.5 V, -2.5 V
(c) 5 V, -5 V                    (d) 7.5 V, 2.5 V

Dear Student,
Post multiple queries in different threads.

Kindly refer to the link for the answer to question number 22,

https://www.meritnation.com/ask-answer/question/q-17-capacitance-17-four-identical-capacitors-are-con/physical-world/12024821 

Regards

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