OHM'S
LAW 
FACTOR 
WHAT? 
SYMBOL 
UNIT 
VOLTAGE
 after Alessandro
Volta
 electrical pressure
 energy potential
 voltage is the difference in potential energy between two points in a circuit

VOLTAGE 
V
VOLTAGE 
V
volts
a measure of
potential energy
(E) 
CURRENT
 discovered by Ampere
 rate of flow of electrons
 flow of current in a closed circuit due to
application of a voltage
 measured in Coulombs per sec 
 electrons flow from negative to positive
* 1 Coulomb is 6.24 x 10^{18
} electrons

I
Intensity of current flow
CURRENT

A
amps
 the rate of current flow

RESISTANCE
 by Simon Ohm 
 opposition to current flow
 indicates electrical energy is being converted into another energy
form

R
resistance
b
In AC it is called Impedance
Z =
X_{L}_{inductive reactance}
X_{C}  capacitive reactance

......
ohms
measure of the opposition to current
flow 