Question

Four charges, two $+8\mu C$ and two $-1\mu C$ are fixed at $(0,\pm \sqrt{\frac{27}{2}m})$ and $(0,\pm \sqrt{\frac{3}{2}m})$ respectively. A third charge of $\frac{1}{3}\mu C$ and mass 2g is at a large distance along the x-axis. Find the minimum velocity to be given to the $\frac{1}{3}\mu C$ charge such that it just reaches the origin (in $m{s}^{-1}$).

• A. 2
• B. 3
• C. 5
• D. 10

Answer 1

Answer: (B)