A hollow cylinder has a charge `qC` within it. If `phi` is the electric flux in unit of voltmeter associated with the curved surface `B` the flux linked with the plance surface `A` in unit of voltmeter will be

Options

A. `(1)/(2) ((q)/(in_(0)) - phi)`
B. `(q)/(2 in_(0))`
C. `(phi)/(3)`
D. `(q)/(in_(0)) - phi`

Answer

1

Explanation

`phi_(A) + phi_(C ) + phi_(B) = (q_(in))/(in_(0))`
`phi_(A) = phi_(C ) , q_(in) = q , phi_(B) = phi`
`2 phi_(A) + phi = (q)/(in_(0))`
`phi_(A) = (1)/(2) ((q)/(in_(0)) -phi)`