A capacitor of `20muF` is given a potential difference of 500 V and a `10muF` capacitor is charged through a potential difference of 200 V. What is the potential across each when they are connected in parallel ?

Options

A. 200 V
B. 400 V
C. 600 V
D. 800 V

Answer

B

Explanation

`C_(1)=20muF, V=500V`
`C_(2)=10muF, V_(2)=200V," "V=?`
`V=(C_(1)V_(1)+C_(2)V_(2))/(C_(1)+C_(2))`
`=(20xx10^(-6)xx500+10xx10^(-6)xx200)/(30xx10^(-6))`
V = 400V