Download Document

Parallel Plate Capacitor
Capacitor with power supply
Electric field lines always point from positive to negative.
Electric Field Simulator
Uniform electric field between the charged plates
Electric field inside conductor is zero.
Faraday cage
The electric field inside a Faraday cage is zero.
Kinetic Energy - Energy of motion
Potential Energy - Energy of position
If an object is in a location where it really doesn't want to
be, it has a lot of potential energy. In order for the object
to be located in this position, work must be done.
Work = (Force)(distance)
W = Fd (1 Joule = 1Newton-meter)
Potential energy converts to kinetic energy.
It takes work to separate positive and negative charges.
This causes an increase in potential energy.
Electric Potential = Electric Potential Energy per charge
V = PE/q
1 volt = 1 Joule/coulomb
Electric Potential is also called voltage.
Example: If 0.05 C of charge has a PE of 30 J, then its
voltage is ?
V = PE/q = 30J/0.05C = 600V
In this diagram, the negative charge gains voltage while
the positive charge loses voltage. In both cases, the
potential energy decreases (- want to go to + and + want
to go to -).
Faraday cages can block reception