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Question

(A) The electric potential $V$ due to a point charge $q$ at a distance $r$ is given by $V = \frac{kq}{r}$.Since all charges in the system are positive

Vedclass · Accepted Answer

Net potential of the system cannot be zero at a point but net electric field can be zero at that point.

Vedclass · Answer

(A) The electric potential $V$ due to a point charge $q$ at a distance $r$ is given by $V = \frac{kq}{r}$.Since all charges in the system are positive,the potential $V = \sum \frac{kq_i}{r_i}$ will always be the sum of positive terms,which can never be zero at any point in space (except at infinity).However,the electric field $\vec{E} = \sum \frac{kq_i}{r_i^2} \hat{r}_i$ is a vector quantity. For a group of charges,there can exist points in space where the vector sum of the electric fields from individual charges cancels out,resulting in a net electric field of zero.Therefore,for a system of positive charges,the net potential cannot be zero,but the net electric field can be zero at a point.

Considering a group of positive charges,which of the following statements is correct?

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