Question

Related to the diagram of two charges, $+Q$ and $-4Q$. The net electric field is zero near which point?

• A. $A$
• B. $B$
• C. $C$
• D. $D$

Answer 1

The correct option is A $A$

At any point the direction of electric field due to charge $Q$ is away from $Q$ and due to $-4Q$ will be towards the $-4Q$. So the required point should not be between two charges.

As $|Q|<|-4Q|$ the point of zero electric field should be nearer to $Q$, to cancel the electric field due to $-4Q$. Out of the given options, $A$ fits the above criteria.