The bob of a simple pendulum has mass 2 g and a charge of 5.0 μ C. It is at rest in a uniform horizontal electric field of intensity 2000 V / m. At…

The bob of a simple pendulum has mass $\displaystyle 2$ g and a charge of $\displaystyle 5.0 \mu \mathrm{C}$. It is at rest in a uniform horizontal electric field of intensity $\displaystyle 2000 \mathrm{~V} / \mathrm{m}$. At equilibrium, the angle that the pendulum makes with the vertical is : $$\left(\text { take } \mathrm{g}=10 \mathrm{~m} / \mathrm{s}^2\right) $$