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Two identical capacitors are joined in p...

Two identical capacitors are joined in parallel, charged to a potential `V` and then separated and then connected in series i.e. the positive plate of one is connected to negative of the other

A

The charges on the free plates connected together are destroyed

B

The charges on the free plates are enhanced

C

The energy stored in the system increases

D

The potential difference in the free plates becomes `2 V`

Text Solution

Verified by Experts

The correct Answer is:
D
`Q_(1) = CV` and `Q_(2) = CV`
Applying charge conservation `CV_(1) + CV_(2) = Q_(1) + Q_(2)`
`CV_(1) + CV_(2) = 2CV rArr V_(1) + V_(2) = 2V`
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Knowledge Check

  • Six identical capacitors are joined in parallel, charged to a potential difference of 10 V, separated and then connected in series. Then the potential difference between the free plates is

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