Chapter 36, Problem 74E

(a)

To determine

The expression of electric field at a distant point $P$.

(b)

To determine

The expression of resultant electric field in terms of real part of complex quantity.

(c)

To determine

The expression of electric filed by using the properties of exponential function, and the electric filed at point $P$ by using Euler’s equation.

(d)

To determine

The expression of intensity at an angle $\theta$.

(e)

To determine

The intensity at $N=2$, and the comparison of the intensity at $N=2$ with equation (35.10) of intensity.