Question

For the given uniformly charged ring of linear charge density $+10\text{nC/m}$, the electric field in $y-$ direction at point $\text{P}$ is

• A. $100\text{N/C}$
• B. $200\text{N/C}$
• C. Zero
• D. $150\text{N/C}$

Answer 1

The correct option is C Zero


For every small element of uniformly charged ring, there is small element on diameterically opposite side whose $y-$ component of electric field$\left(dE\sin \theta \right)$ cancels each other.
Therefore, $\int dE\sin \theta =0$ along $y-$ direction.