A 20 F capacitor is charged to 5 V and isolated. It is then connected in parallel with an uncharged 30 F capacitor the decrease in the energy of the system will be

The electric potential at a point due to an electric dipole is zero. What can be concluded about the position of the point?

The electric field in a certain region is $\frac{A}{{{x^3}}}.$ The potential at any point $(x,\,\,y,\,\,z)$ in this region will be (potential is zero at $\infty ,\,\,A$ is a constant)

Twenty seven drops of same size are charged at 230 V each. They combine to form a bigger drop. Calculate the potential of the bigger drop.

A short electric dipole has a dipole moment of $16 imes 10^{-9} \, C \cdot m$. The electric potential due to the dipole at a point at a distance of $0.6 \, m$ from the centre of the dipole, situated on a line making an angle of $60^\circ$ with the dipole axis is: $\left( \frac{1}{4 \pi \in_0} = 9 imes 10^9 \, N \cdot m^2/C^2 \right)$

Two charges +q and –$q$ are kept apart. Then at any point on the right bisector of line joining the two charges

Potentiometer measures potential more accurately because

An electrical charge $2 imes 10^{-8} \mathrm{C}$ is placed at the point $(1,2,4) \mathrm{m}$. At the point $(4,2,0) \mathrm{m}$, the electric

Assume that an electric field $\overrightarrow E = 30{x^2}\hat i$ exists in space. Then the potential difference ${V_A} - {V_O},$ where ${V_O}$ is the potential at the origin and ${V_A}$ the potential at x = 2m is

Assertion:- The dipoles in a dielectric are not completely aligned in weak external electric field. Reason:- Thermal energy tends to de-align them.

Which of the following is the correct expression for the electric potential (V) at an axial point due to a dipole with dipole moment P at a distance r from its center?