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In the circuit the potential difference ...

In the circuit the potential difference across the capacitor is `10 V`. Each resistance is of `3Omega` The cell is ideal. The emf of the cell is
`

A

`14V`

B

`16V`

C

`18V`

D

`24V`

Text Solution

Verified by Experts

The correct Answer is:
A

`V_a-i/4R-iR=V_b`
`:. V_a-V_b=5/4iR=10`………i
`R_(net)=R+((3R)(R))/(3R+R)`
`=7/4R`
`:. i=E/((7/4)R)=((4E)/(7R))`
Substituting in eqn i we have
`(5/4)((4E)/(7R))xxR=10`
`: E=14V`
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