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A hollow cylinder has a charge q coulomb...

A hollow cylinder has a charge `q` coulomb within it. If `phi` is the electric flux in units of volt-metre associated with the curved surface B, then the flux linked with the plane surface A in units of volt-metre will be

A

`(q)/(in_(0))-phi`

B

`(1)/(2)((q)/(in_(0))-phi)`

C

`(q)/(2 in_(0))`

D

`(phi)/(3)`

Text Solution

Verified by Experts

The correct Answer is:
B
`phi_("total")=phi_("curved")+phi_("plane surfaces")=(q)/(in_(0))`
` phi+2phi_(A)=(q)/(in_(0))implies theta_(A)=(1)/(2)[((q)/(in_(0))-phi)`
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