Question

A point charge −Q is located at the origin, while a second point charge +2Q is located at x = d on the x-axis, as shown above. A point on the x-axis where the net electric field is zero is located in which of the following regions?

(A) -∞ < x < 0 

(B) 0 < x < d/2 

(C) d/2 < x < d 

(D) d < x < ∞ 

(E) No region on the x-axis

Answer 1

The correct option is: (A) -∞ < x < 0 

Explanation:

The field is zero where the fields from each charge point in opposite directions and also closer to the smaller charge, which is to the left of the –Q charge.