Coulomb's LawHardQuestion 31468
Question
Three charges +q, +q, −q are placed at (0,0), (d,0), (d/2,d√3/2) — equilateral triangle. Net force on −q:
- A√3kq²/d²Correct
- Bkq²/d²
- C2kq²/d²
- DZero
Correct answer
√3kq²/d²
Explanation
Each +q exerts kq²/d² on −q. By vector addition (120° between them): F_net = √3×kq²/d² directed toward midpoint of the two +q charges.