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In the R-C circuit shown in the figure t...

In the `R-C` circuit shown in the figure the total enegry of `3.6 xx 10^(-3)J` is dissipated in the `10 Omega` resistor when the switch `S` is cloed. The initially charge on the capacitor is

A

`60 muC`

B

`120 muC`

C

`60 sqrt(2)muC`

D

`(60)/(sqrt(2))muC`

Text Solution

Verified by Experts

The correct Answer is:
B
`H = U_(i) - U_(f) rArr H = U_(i)`
`H= (q^(2))/(2C) rArr 3.6 xx 10^(-3) = (q^(2))/(2xx2xx10^(-6))`
`q = 120 muC`
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