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Four identical capacitors are connected ...

Four identical capacitors are connected in series with a `10 V` battery as shown in the figure. The point `N` is earthed. The potentials of points `A` and `B` are
`

A

`10V,0V`

B

`7.5V,-2.5V`

C

`5V,-5V`

D

`7.5V,2.5V`

Text Solution

Verified by Experts

The correct Answer is:
B
All capacitors have equal capacitance. Hence equal potential drop `(=2.5V)` will take place across all capacitors.
`V_N-V_B=2.5V`
`=0-V_B=2.5V`
`:. V_B=-2.5V`
Further, `V_A-V_N=3(2.5)V`
`=7.5N`
`:. V_A=+7.5N` (as `V_N=0`)
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