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 ?
(a) \( \frac{q}{2\varepsilon_0} \)
(b) \( \frac{\phi}{3} \)
(c) \( \frac{q}{\varepsilon_0} - \phi \)
(d) \( \frac{1}{2} \left( \frac{q}{\varepsilon_0} - \phi \right) \)
Answer : (d) \( \frac{1}{2} \left( \frac{q}{\varepsilon_0} - \phi \right) \)
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