Unit 18 Resistive-Inductive Resistive-Inductive

Question 1

R-L Series Circuits

Answer 1

When a circuit containing both resistance, R, and
inductance, L, is connected to an AC circuit, the voltage and current will be out of phase with each other by some amount between 0° and 90°.

Question 2

VARs represents the

Answer 2

is true power. VARs represents the product of the volts and amperes that are 90 Degrees out of phase with each other, such as the voltage dropped across the inductor and the current flowing through the inductor.

Question 3

VARs is often referred to as

Answer 3

quadrature power, or wattless power.

Question 4

apparent power (VA)

Answer 4

Volt-amperes (VA) is the apparent power of the circuit.

the value found by multiplying the applied voltage by the total current of an AC circuit. Ap-parent power is measured in volt-amperes (VA) and should not be confused with true power, measured in watts.

Question 5

Impedance

Answer 5

defined as a measure of the part of the circuit that impedes, or hinders, the flow of current.

Question 6

VARs is an abbreviation for

Answer 6

volt-amperes-reactive and is the amount of reac-tive power (VARs) in the circuit.
VARs should not be confused with watts, which is true power. VARs represents the product of the volts and amperes that are 90 Degrees out of phase with each other,

Question 7

VARs is often referred to as

Answer 7

quadrature power, or wattless power.

Question 8

why is this called apparent power (VA)

Answer 8

because it is the value that would be found if a voltmeter and ammeter were used to measure the circuit voltage and current and then these measured values were multiplied together

Question 9

Power factor (PF)

Answer 9

is a ratio of the true power to the apparent power.

It can be calculated by dividing any resistive value by its like total value.

Question 10

angle theta

Answer 10

The angular displacement by which the voltage and current are out of phase with each other is called angle theta