Question

two fixed point charges 4Q and 2Q are separated by a distance x. where should the third point charge q be placed for it to be in equilibrium​

Answer 1

Answer:

Charge q should be negative to achieve equilibrium Also if charge is placed in region (1) or (3) the charge will attract the charge in the middle while the other positive charge pushes the middle charge towards q. So only region (2) is appropriate Let distance between 4Q and q be ‘d’ then for equilibrium Read more on Sarthaks.com - https://www.sarthaks.com/365954/fixed-point-charged-separated-distance-where-third-point-charge-should-placed-equilibrium?show=365957#a365957