A hollow cylinder has a charge q coulomb within it. If $f$ 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 V-m will be

Question

${q \over {2{\varepsilon _0}}}$

${\phi \over 3}$

${q \over {{\varepsilon _0}}} - \phi $

${1 \over 2}\left( {{q \over {{\varepsilon _0}}} - \phi } \right)$

Solution

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