Physics

Problem

The bob of a simple pendulum has mass

2 \text{ g}

and a charge of

5.0 \mu\text{C}

. It is at rest in a uniform horizontal electric field of intensity

2000 \text{ V/m}

. At equilibrium, the angle that the pendulum makes with the vertical is: (take

g = 10 \text{ m/s}^2

) a.

\tan^{-1}(2.0)

\tan^{-1}(0.2)

\tan^{-1}(5.0)

\tan^{-1}(0.5)