ELECTRONIC FORMULAS:

Ohm's Law Formulas for D-C Circuits:

Ohm's Law Formulas for A-C Circuits:

In these formulas is the angle of lead or lag between current and voltage and cos = P/EI = power factor.

Resistors in Series: R_total = R₁ + R₂ + R₃ + . . . .

Two Resistors in Parallel:

Resistors in Parallel, General Formula:

Sinusoidal Voltages and Currents:

	Effective value [Also known as Root-Mean Square (RMS) value]	=	0.707 x peak value
	Half Cycle Average value	=	0.637 x peak value
	Peak value	=	1.414 x effective value
	Effective value	=	1.11 x average value

Resonant Frequency Formulas:

*Where in the second formula f is in kHz and L and C are in microunits.

Conductance:

Reactance Formulas:

Impedance Formulas:

Q or Figure of Merit:

Voltage/Current Phase Rule of Thumb:

Remember "ELI the ICE man"

ELI: Voltage (E) comes before (leads) current (I) in an inductor (L)

ICE: Current (I) comes before (leads) Voltage (E) in a capacitor (C)