Two point charges $Q_1, Q_2$ are fixed at $x = 0$ and $x = a$. Assuming that field strength is positive in the direction coinciding with the positive direction of $x$, then, which following option will be correct ?
Both $Q_1$ and $Q_2$ are negative with $|Q_1| > |Q_2|$
$Q_1$ is positive and $Q_2$ is negative with $\left| {{Q_1}} \right| > \left| {{Q_2}} \right|$
$Q_1$ is negative and $Q_2$ is positive with $|Q_1| > |Q_2|$
Both are positive $|Q_1| > |Q_2|$
Figures below show regular hexagons, with charges at the vertices. In which of the following cases the electric field at the centre is not zero
Two parallel large thin metal sheets have equal surface charge densities $(\sigma = 26.4 \times 10^{-12}\,c/m^2)$ of opposite signs. The electric field between these sheets is
Write equation of electric field by system of $\mathrm{'n'}$ charges.
The number of electrons to be put on a spherical conductor of radius $0.1\,m$ to produce an electric field of $0.036\, N/C$ just above its surface is
A charged spherical drop of mercury is in equilibrium in a plane horizontal air capacitor and the intensity of the electric field is $6 × 10^4 $ $Vm^{-1}$. The charge on the drop is $8 × 10^{-18}$ $C$. The radius of the drop is $\left[ {{\rho _{air}} = 1.29\,kg/{m^3};{\rho _{Hg}} = 13.6 \times {{10}^3}kg/{m^3}} \right]$