Consider a point with the point z, located on the positive z-axis. The ring has a radius a. An electric field vector originating from an element of charge on the ring makes an angle θ with the z-axis.
The electric field vector can be decomposed into two components. One component points in the positive z-axis. The other component points parallel to the radius.
Consider a uniformly charged ring in the xy plane, centered at the origin. The ring has radius a and positive charge q distributed evenly along its circumference.
Part A. What is the direction of the electric fieldat any point on the z axis?
A. parallel to the x axis
B. parallel to the y axis
C. parallel to the z axis
D. in a circle parallel to the xy plane
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