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Four condensers each of capacity 4muF ar...

Four condensers each of capacity `4muF` are connected as shown in the adjoining figure.
If `V_(P)-V_(Q)=15V`, the energy stored in the system is

A

2.4 ergs

B

1.8 ergs

C

3.6 ergs

D

5.4 ergs

Text Solution

Verified by Experts

The correct Answer is:
B
From figure, the equivalent capacity of the combination is,
`1/C_(s)=1/4+1/((4+4))+1/4=5/8`
`therefore" "C_(s)=8/5mmuF" ""Thus",`
`E=1/2C_(s)V^(2)=1/2xx8/5xx10^(-9)xx225`
`E=1.8xx10^(-7)J=1.8erg.`
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