Electrostatics - Electromagnetism - Physics Previous Year Questions

The net electric force on a charge of \(+3 \mu \mathrm{C}\) at the mid-point on the line joining two charges of magnitude \(+2 \mu \mathrm{C}\) and \(-2 \mu \mathrm{C}\) separated by the distance of \(6 \mathrm{~mm}\), is

An electric charge does not have which of the following properties?

A hollow sphere of radius \(0.1 \mathrm{~m}\) has a charge of \(5 \times 10^{-8} \mathrm{C}\). The potential at a distance of 5 \(\mathrm{cm}\) from the centre of the sphere is \(\left(\frac{1}{4 \pi \varepsilon_0}=9 \times 10^9 \mathrm{Nm}^2 \mathrm{C}^{-2}\right)\)

Electric field in the region is given by \(\mathbf{E}=\left(M / x^4\right) \hat{\mathbf{i}}\), then the correct expression for the potential in the region is (assume potential at infinity is zero)

Eight dipoles of charges of magnitude $e$ each are placed inside a cube. The total electric flux coming out of the cube will be

The work done in moving a charge particle of charge $2 \times 10^{-8} \mathrm{C}$ between two points having potential difference of 36 V is

Two point charges of $+3 \mu \mathrm{C}$ and $-3 \mu \mathrm{C}$ are placed at a certain distance apart from each other. Electric potential at a distance 60 cm from the mid-point of dipole on axial line is 150 V , then the value of dipole length is

Three charges, each of $+4 \mu \mathrm{C}$, are placed at the corners $A, B, C$ of a square $A B C D$ of side 1 m . What is the magnitude (in $\mathrm{NC}^{-1}$ ) of electric field at point $O$ towards point $D$ ?