Chapter 16 pt2

The figure shows four Gaussian surfaces surrounding a distribution of charges. (a) Which Gaussian surfaces have an influx of +q/eo through them? (b) Which Gaussian surfaces have no electric influx through them?

(a) Surface B (b) Surface A and Surface C

Four point charges of equal magnitude but with varying signs are arranged on the three corners and at the center of the square of side d as shown in the figure. Which one of the arrows shown represents the net force acting on the center charge?

A

Which one of the arrows shown best represents the direction of the electric field between the two uniformly charged plates?

A

Three point charges, +Q, -Q, and +Q are placed at the corners of a square of side d as shown in the figure, which one of the arrows shown represents the direction of the net electric field at the center of the square?

C

Two stationary point charges q1 and q2 are shown in the figure along with a sketch of some field lines representing the electric field produced by them. What can you deduce from the sketch?

q1 is negative and q2 is positive. the magnitude of q1 is less than the magnitude of q2

If two charged plates were moved until they are half the distance shown without changing the charge on the plates, the electric field near the center of the plates would...

remain almost exactly the same