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Three capacitors of capacitances 5muF,2m...


Three capacitors of capacitances `5muF,2muF` and `2muF` are charged to 20 V, 30 V and 10 V respectively and then connected in the circuit with polarities as shown. The magnitude of charge flown through the battery after closing the switch S is

A

`25muC`

B

`40muC`

C

`50muC`

D

`75muC`

Text Solution

Verified by Experts

The correct Answer is:
A

`(q)/(5)+((q-40)/(2))+((q-120)/(2))=10`
`(6q)/(5)=90`
`q=75muC`
`therefore` magnitude of charge flown through the battery is
`Deltaq=100-75=25muC`
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