A hollow cylinder has charge $q$ $C$ within it. If $\phi $ is the electric flux in unit of voltmeter associated with the curved surface $B$, the flux linked with the plane surface $A$ in unit of voltmeter will be
$\frac{1}{2}\left( {\frac{q}{{{\varepsilon _0}}} - \phi } \right)$
${\frac{q}{{{2\varepsilon _0}}}}$
${\frac{q}{{{\varepsilon _0}}}}$
${\frac{q}{{{\varepsilon _0}}} - \phi }$
Find flux related to shaded face $BCGF$
In a particle accelerator, a current of $500 \,\mu A$ is carried by a proton beam in which each proton has a speed of $3 \times 10^7 \,m / s$. The cross-sectional area of the beam is $1.50 \,mm ^2$. The charge density in this beam (in $C / m ^3$ ) is close to
The equivalent capacitance of the system of capacitors between $A$ and $B$ as shown in the figure
Find capacitance across $AB$
Angle between equipotential surface and lines of force is.......$^o$