Two charge $ + \,q$ and $ - \,q$ are situated at a certain distance. At the point exactly midway between them
Electric field and potential both are zero
Electric field is zero but potential is not zero
Electric field is not zero but potential is zero
Neither electric field nor potential is zero
The linear charge density on a dielectric ring of radius $R$ varies with $\theta $ as $\lambda \, = \,{\lambda _0}\,\cos \,\,\theta /2,$ where $\lambda _0$ is constant. Find the potential at the centre $O$ of ring. [in volt]
Four electric charges $+q,+q, -q$ and $-q$ are placed at the comers of a square of side $2L$ (see figure). The electric potential at point $A,$ midway between the two charges $+q$ and $+q,$ is
The electric potential inside a conducting sphere
Consider the points lying on a straight line joining two fixed opposite charges. Between the charges there is
Two charges ${q_1}$ and ${q_2}$ are placed at $(0, 0, d)$ and$(0, 0, - d)$ respectively. Find locus of points where the potential is zero.