AIIMS2016PhysicsElectrostatics
Three identical charges are placed at the vertices of an equilateral triangle. The force experienced by each charge, (if k=1 / 4 ₀ ) is
Options
- A2 k q^2 r^2
- Bk q^2 2 r^2
- C3 k q^2 r^2
- Dk q^2 2 r^2
Correct answer
C. 3 k q^2 r^2
Step-by-step solution
Force on charge q at A : (i) Due to B, f=k q q r^2 or f= k q^2 r^2 along B A (ii) Due to C , f= k q^2 r^2 along C A Resultant force =F aligned & F^2=f^2+f^2+2 f f 60^ & F^2=2 f^2+ 2 f^2 1 2 =3 f^2 or F= 3 f & or Resultant force = 3 kq r^2 aligned