Calculate the x-component of the electric field produced by the charge distribution Q at points on the positive x-axis where x>a. Express your answer in terms some or all of the variables Q, a, x, r, and constant k.

Explanation:

From the image attached below:

It is required to determine the electric field because of the line charge distribution of positive charge distributed uniformly from x = 0 to x = a at point x from O;

where x > a

Assume we chose an element dy at a distance from the point.

Then, the change on

The electric field due to this dy length is

Thus, the total electric field

Hence, the electric field  

c)as speed changes, wavelength and frequency change.

everything changes!

need to see circuit to get time constant