Question

The direction $\left(\theta \right)$ of $\overrightarrow{E}$ at point $P$ due to uniformly charged finite rod will be

• A. at angle ${30}^{\circ }$ from x-axis
• B. ${45}^{\circ }$ from x-axis
• C. ${60}^{\circ }$ from x-axis
• D. one of these

Answer 1

The correct option is A at angle ${30}^{\circ }$ from x-axis

The angle suspended by the finite line charge at $P={60}^0$

So the resultant electric field due to line charge will be at $60/2\Rightarrow {30}^0$ since we can assume the charge concentrated at the centre of finite line charge.