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

Answer

D

Explanation

`phi + 2phi' = (q)/(epsilon_(0))`
`phi' = (1)/(2) ((q)/(epsilon_(0))-phi)`