411 REFERENCE · Wikibooks
Practical Electronics/Basic Theory/General Formulae
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Charge
Charge refers to quantities of Electric Charge of an object
1 C = Number of Electrons e
Voltage
Voltage is defined as Work done on a Charge
Current
Current is defined as ratio of Charge over Time
I , Current
Q , Charge
t , Time
Resistance
R , Resistance
V , Voltage
I , Current
Conductance
G , Conductance
R , Resistance
I , Current
V , Volatge
Reactance
X = ± j ω T
X , Reactance
ω , Angular of Frequency
T , Time Constant
Impedance
Z = R + X
Z , Impedance
R , Resistance
X , Reactance
Power
Power Loss
P R = I V = =
Power Delivered
Power Stored