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Condsider . Now the switch is shifte...

Condsider
.
Now the switch is shifted to position `2`. The charge appearing on capacitor `C_(3)` is`

A

`225 muC`

B

`235 muC`

C

`270 muC`

D

`75 muC`

Text Solution

Verified by Experts

The correct Answer is:
A
When switch is in position `1`,
`30=q/(20)-q/(30)=0` or `q=360 muC`
Now, the switch is in position`2`,
.
Loop` ABCD`,

`(Q'_(1))/(20)-(Q'_(1))/(30)+Q_(3)/(20)=0`
or `-3q'_(1)-2q_(1)+3q_(3)=0`
or `5q'_(1)=3q_(3)` or `q'_(1)=(3)/(5)q_(3)`
`(8q_(3))/5=360`
`q_(3)=(360xx5)/8=(450)/2muC=225muC` (ii)
`q'_(1)=3/5((450)/(2))=135 muC`.
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