Inductive-Reactive Series Circuits

Angle theta is the phase angle difference between

voltage and current in a reactive circuit

Apparent power abbreviation

VA

Apparent power is measured in

volt-amperes

Apparent power formula

V x I

Power factor

comparison of true power to apparent power in an AC circuit

In a pure resistive load voltage and current are (in phase or out of phase) with each other

in phase

In a pure inductive load, voltage and current are (in or out of phase) with each other

out of phase

In a pure inductive circuit voltage and current are how many degrees out of phase

90 degrees

In a circuit with both resistive and inductive loads, voltage and current are out of phase by how much

some amount between 0 and 90 degrees

Exact amount of phase angle difference is determined by

ratio of R to L

Impedance represented by the letter

Z

Impedance formula

Z² = XL² + R²

Voltage total formula

E = I x Z

Inductor voltage

E = I x XL

VARs formulas

EL x XL

El² / IL

IL² x XL

Power factor formulas

Er / Et

R / Z

P / VA

cos theta formula

cos theta = PF