RL Circuit

Which of the following formulas CAN NOT be used to determine the power factor in a series RL circuit?

• PF = IR/IT

• PF = P/VA

• PF = R/Z

• PF = ER/ET

Which of the following formulas can be used to determine the power factor in a parallel RL circuit?

• PF = R/Z

• PF = Z/R

• PF = IR/IL

• PF = ER/ET

In a series RL circuit what components are in phase?

• ET,ER,EL

• IT,IR,IL

• Z,R,XL

• VA,P,VARs

In a parallel RL circuit what components are in phase?

• ET,ER,EL

• IT,IR,IL

• Z,R,XL

• VA,P,VARs

In an RL circuit what components are out of phase by 90°?

• All Current components in Series

• Resistive and their total components

• Resistive and inductive components

• All Voltage components in Parallel

In an RL circuit what components are out of phase by somewhere between 0° and 90°?

• All Current components in Series

• Resistive and their total components

• Resistive and inductive components

• All Voltage components in Parallel

Which of the following is a total value in an RL circuit?

• Impedance (Z)

• Apparent Power (VA)

• Total Voltage (ET)

• All these answers are correct

Which of the following is NOT Measured in Ohms?

• Impedance (Z)

• Inductive Reactance (XL)

• Reactive Power (VARs)

• Resistance (R)

What formula should be used to find total voltage in a series RL circuit?

• ET = ER = EL

• ET = ER + EL

• ET = √(ER²+EL²)

• ET =

  1/(√((1/ER)²+(1/EL)²)

What formula should be used to find the impedance in a parallel RL circuit?

• Z = R = L

• Z = R + XL

• Z = √(R²+XL²)

• Z =

  1/(√((1/R)²+(1/XL)²)