Question

A body of $20\text{ g}$ and $+50\ \mu\text{C}$ charge is suspended from the ceiling by a string. If a horizontal electric field of $10\text{ kV/m}$ is applied, the angle between the string and vertical direction is: (Take $g = 10\text{ N/kg}$)

• A. $\tan^{-1}(2.50)$
• B. $\tan^{-1}(3.00)$
• C. $\tan^{-1}(3.50)$
• D. $\sin^{-1}(2.50)$

Hint:

For any particle in a horizontal field, the angle $\theta$ is always determined by the ratio of the horizontal force to the vertical force: $\tan\theta = F_h / F_v$.

Answer 1

The Correct Option is A