Question

What are the expressions for the electric field at point P being a very far away point, such that z>>R, and at the center of the ring (z = 0)?

a) E_far = kQ/z^2, E_center = 0
b) E_far = 0, E_center = kQ/R^2
c) E_far = kQ/R^2, E_center = 0
d) E_far = 0, E_center = kQ/z^2

Answer 1

The expressions for the electric field at a very far away point and at the center of the ring are E_far = 0 and E_center = kQ/R^2, respectively.

Step-by-step explanation:

In the given question, we are asked to determine the expressions for the electric field at point P, which is a very far away point (z >> R) and at the center of the ring (z = 0).

For a very far away point, the correct expression for the electric field is E_far = 0, and for the center of the ring, the correct expression is E_center = kQ/R^2.

Therefore, option c) E_far = kQ/R^2, E_center = 0 is the correct answer.