A $200$ J of work is done in moving a charge $5$ C from a point A where the potential is $-20$ V to another point B where potential is V volt. The value of V at B is

An electric dipole of dipole moment $\vec{P}$ is placed in the uniform electric field $\vec{E}$. Then which of the following statements are correct?
Statement-I: The torque on the dipole is $\vec{P} \times \vec{E}$
Statement-II: The potential energy of the dipole is $-\vec{P} \cdot \vec{E}$
Statement-III: The net force on the dipole is non-zero.

Consider three point charges $-2Q, Q$ and $-Q$ and three surfaces $S_1, S_2$ and $S_3$ as shown in the figure. Match the entries of List-I with that of List-II.

List-I	List-II
(a) Net flux through $S_1$	(i) $\dfrac{-2Q}{\varepsilon_0}$
(b) Net flux through $S_2$	(ii) $\dfrac{-Q}{\varepsilon_0}$
(c) Net flux through $S_3$	(iii) Zero

What will be the total electric flux through the faces of the cube as given in the figure with side of length '$a$' if a charge Q is placed at B midpoint of an edge of the cube (see figure)?