FORMULAS

Charge (Q)

Voltage (V/E)

Current

Energy (E)

Capacitance

Elastane

Conductance

Magnetomotive Force (mmf)

Magnetic Flux Density

Units for Magnetic Flux Density

Magnetic Field Intensity

Energy Stored in an Inductor (W)

Voltage to Capacitance

Effects of Temperature to Resistance

Voltage Divider Formula

Current Divider Formula

1 Coulomb is equivalent to how many electrons

Circular Mill Conversion

1 Joule is equivalent to how many N-m

1 N-m

1 Farad is equivalent to how many Coulomb/Volt

Power Efficiency Formula

Cost of Electrical Work (K)

Alternation, Sine Wave Phase, and Electrical Degrees Conversion

Electrical and Mechanical Degrees Conversion

Frequency Formula

Period (T)

Average Value

Peak-to-Peak Formula

Root Mean Square / Effective Value

Form Factor - RMS/Ave

Crest Factor Formula

Instantaneous Value Formula

Impedance

Resistance from Phase Angle

Power Factor

A

Power Formulas:

Apparent Power formula using Power factor Triangle

Voltage and Current in 3 Phase

Power in 3 Phase

Resonant Frequency

Generated Voltage (Eg)

Lap and Wave Winding

Back EMF (Eb)

DC Generator and Motor

Developed torque (Td)

Percentage Slip (%s)

Percent Speed Regulation (%SR)

EMF Equation for AC Machine

Relationship between peak and RMS voltage

Turns Ratio

Slip Speed

Rotor Frequency

Percent Voltage Regulation (%VR)

Pole Pitch (Yp)

Max HP

Torque-Voltage Relationship Formula

Full Load Torque

Hydraulic HP

Motor HP (Brake HP) Formula

Wye and Delta Conversion if resistors are identical

Luminous Intensity (I)

Illumination

UNIT CONVERSIONS in ILLUMINATION

Inverse Square Law

Cosine law of Illuminance (Lambert’s Cosine Law)

Lumen Method

Lamp Efficacy