-
A hollow cylinder has a charge q coulomb within it. If φ is the electric flux in units of voltmeter associated with the curved surface B, the flux linked with the plane surface A in units of voltmeter will be
-
-
q 2ε0 -
φ 3
-
q - φ ε0 -
1 
q - φ 
2 ε0
-
Correct Option: D
| Since φtotal = φA + φB + φC = | ||
| ε0 |
where q is the total charge.
As shown in the figure, flux associated with the curved surface B is φ = φB
Let us assume flux linked with the plane surfaces A and C be
φA = φC = φ'
| Therefore, | = 2φ' + φB = 2φ' + φ | |
| ε0 |
| ⇒ φ' = | | - φ | | ||
| 2 | ε0 |
