Chapter 19

Topic 1 Electric Field

(a)    Define Electric Field

(b)   How great is the electric field due to a point charge Q at a distance r from the charge.

Topic 2 Voltage

(a)    What is a volt?

(b)   How great is the voltage due to a point charge Q at a distance r from the charge.

Topic 3 Capacitance

Define

(a) Capacitance C

(b) Dielectric Constant K

Topic 4 Capacitor circuits

What is the total capacitance of a capacitor circuit when the capacitors are connected (a) in series and (b) in parallel ?

Examples

Two corners of an equal lateral triangle,  50 cm on a side, are occupied by a +1 µC charge. What is the electric field and voltage at (a) the third corner and (b) the center of the triangle?

How great is the capacitance of a sphere 15 cm in diameter?

A Leiden Jar will be charged with a Van de Graaff generator in class and, using classroom measurements, the capacitance and charge held by the Leiden Jar will be calculated.

Textbook Problems