Two charges $ + 5\,\mu C$ and $ + 10\,\mu C$ are placed $20\, cm$ apart. The net electric field at the mid-Point between the two charges is
$4.5 \times {10^6}\, N/C$ directed towards $ + 5\,\mu C$
$4.5 \times {10^6}\, N/C$ directed towards $ + 10\,\mu C$
$13.5 \times {10^6}\, N/C$ directed towards $ + 5\,\mu C$
$13.5 \times {10^6}\, N/C$ directed towards $ + 10\,\mu C$
What is the magnitude of a point charge due to which the electric field $30\,cm$ away has the magnitude $2\,newton/coulomb$ $[1/4\pi {\varepsilon _0} = 9 \times {10^9}\,N{m^2}/{C^2}]$
The electric field intensity at a point in vacuum is equal to
A circular ring carries a uniformly distributed positive charge. The electric field $(E) $ and potential $ (V) $ varies with distance $(r)$ from the centre of the ring along its axis as
In the given figure distance of the point from $A$ where the electric field is zero is......$cm$
A charged ball $B$ hangs from a silk thread $S$, which makes an angle $\theta $ with a large charged conducting sheet $P$, as shown in the figure. The surface charge density $\sigma $ of the sheet is proportional to