Module 2 unit 16, 17, 18
96 V
In a series RL circuit, ET = 120 V, R = 40 Ω, and XL = 30 Ω. What is ER?
41.2 V
A series RL circuit contains two resistors and two inductors. The resistors are 27 Ω and 47 Ω. The inductors have inductive reactances of 50 Ω and 40 Ω. The applied voltage is 120 V. What is the voltage drop on the inductor that has 40 Ω of reactance?
48.37 degrees
A series RL circuit contains two resistors and two inductors. The resistors are 33 Ω and 47 Ω. The inductors have inductive reactances of 60 Ω and 30 Ω. Angle theta is _____.
32.89 V
A series RL circuit contains two resistors and two inductors. The resistors are 33 Ω and 47 Ω. The inductors have inductive reactances of 60 Ω and 30 Ω. The applied voltage is 120 V. What is the voltage drop on the 33 Ω resistor?
146.66 ohms
A series RL circuit contains two resistors and two inductors. The resistors are 43 Ω and 54 Ω. The inductors have inductive reactances of 70 Ω and 40 Ω. The total impedance is _____.
80 ohms
A series RL circuit contains two resistors. The resistors are 33 Ω and 47 Ω. When calculating the circuit values, the total resistance used is _____.
90 ohms
A series RL circuit contains two resistors. The resistors are 60 Ω and 30 Ω. When calculating the circuit values, the total resistance used is _____.
29.86 degrees
A series RL circuit has a resistance of 270 Ω and an inductive reactance of 155 Ω. How many degrees is angle theta (<θ)?
8.045 A
A series RL circuit has two resistors and two inductors. The resistors dissipate 7 W and 12 W. The inductive powers are 15 VARs and 8 VARs. The applied voltage is 240 V. How much is the circuit current?
20 ohms
An inductor has an inductive reactance of 12 Ω, and a wire resistance of 16 Ω. What is the impedance of the inductor?
73.4 ohms
An inductor has an inductive reactance of 64 Ω, and a wire resistance of 36 Ω. What is the impedance of the inductor?
50 ohms
An inductor is connected to a 120-V, 60-Hz supply. The current in the circuit is 2.4 A. What is the inductive reactance?
0.127 H
An inductor is connected to a 240-V, 60-Hz supply. The current in the circuit is 5 A. What is the inductance of the inductor?
0.2 H
An inductor is connected to a 60 Hz circuit. The inductive reactance is 75.4 Ω. What is the inductance of the inductor?
1131 ohms
An inductor with an inductance of three henrys (H) is to be connected to a 60 Hz circuit. What will the inductive reactance be?
inductance
Circuits are generally considered to contain _____ when any type of load that contains a coil is used.
current
Dividing a circuit's total applied voltage by the total impedance results in the total _____.
lags voltage by 90 degrees.
In a pure inductive circuit, current _____.
40.75 VAR's
In a series RL circuit ET = 120 V, R = 150 Ω, and XL = 270 Ω. What is the reactive power?
288 VA
In a series RL circuit, ET = 120 V, R = 30 Ω, and XL = 40 Ω. What is the apparent power?
72 V
In a series RL circuit, ET = 120 V, R = 40 Ω, and XL = 30 Ω. How much is EL?
14.4 W
In a series RL circuit, ET = 120 V, R = 500 Ω, and XL = 500 Ω. What is the true power?
Power Factor
In a series RL circuit, the angle between the voltage and current is called angle theta (<θ). The cosine of the angle is equal to the _____.
Resistance
In a series circuit, the total _____ is equal to the sum of the individual resistors.
VA
Of the different power values in an RL circuit, which one is known as apparent power?
VAR's
Of the different power values in an RL circuit, which one is known as wattless power?
true, apparent
Power factor (PF) is the ratio of the _____ power to the _____ power.
quality (Q)
The amount of resistance compared with the inductive reactance determines the _____ of the coil.
Reactance
The current-limiting property of an inductor is called _____.
Inductive Reactance
The symbol XL stands for _____.
XL
The symbol for reactance is _____.
VAR's
The symbol for reactive power of an inductor is _____.
Impedance
The total current-limiting effect is called _____.
henry
The unit of inductance is the _____.
3.54 A
Two inductors are connected in parallel to a 120-V, 60-Hz supply. The values of the inductors are 0.15 H and 0.225 H. The total inductive reactance is _____.
533.49 ohms
Two inductors are connected in parallel to a 120-V, 60-Hz supply. The values of the inductors are 1.5 H and 2.5 H. The total inductive reactance is _____.
0.74 A
Two inductors are connected in series to a 120-V, 60- Hz supply. The values of the inductors are 0.175 H and 0.255 H. The total circuit current is _____.
1508 ohms
Two inductors are connected in series to a 120-V, 60- Hz supply. The values of the inductors are 1.5 H and 2.5 H. The total inductive reactance is _____.
reactive power
Volt-amperes-reactive is used to measure the _____ in a pure inductive circuit.
induced
When a magnetic field continually changes magnitude and direction, a voltage is continually being induced in the coil. This voltage is called _____ voltage.
76.68 W
You connect a clamp-on ammeter and a voltmeter to a series RL circuit powered by a 60-Hz circuit. The voltage reads 120 V and the current is 0.715 A. The resistor is 150 Ω. What is the true power?
