Chapter 21, Problem 2CQ

Charge q is fired through a small hole in the positive plate of a capacitor, as shown in Figure Q21 .2

Figure Q21.2

A. If q is a positive charge, does it speed up or slow down inside the capacitor? Answer this question twice: (I) Using the concept of force. (ii) Using the concept or energy.

B. Repeat part a if q is a negative charge.