Electric Field Due to a Line of Charge Not on Its Axis

Q.

A charge Q is distributed uniformly along a rod of lengths L. The electric field at a distance ‘d’ along its axis from its closer end will be

1. $\frac{KQ}{d^2}$

2. $\frac{KQ}{d^2+dL}$

3. $\frac{KQ}{d^2+\frac{L^2}{4}}$

4. None of these

Q. The field due to a positively charged infinite rod at a point not on the rod are the rod.

1. parallel to
2. $\perp$ and out of
3. $\perp$ and into