Question 1

If a low-pass RL filterʹs cutoff frequency is 20 kHz, its bandwidth is ________.

Accepted Answer

A)  40 kHz
B)  20 kHz
C)  0 Hz
D)  unknown

Question 2

If a load is purely inductive and the reactive power is 10 VAR, the apparent power is ________.

Accepted Answer

A)  14.14V
B)  3.16V
C)  10V
D)  1.144V

Question 3

Power dissipated by the resistor in a parallel RL circuit can be increased With the addition of a capacitor in parallel.

Accepted Answer

A) True 
 B)False

Question 4

An ohmmeter can be used to accurately test the impedance of an RL circuit.

Accepted Answer

A) True 
 B)False

Question 5

If the true power is 10W and the reactive power is 10 VAR, the apparent power is ________.

Accepted Answer

A)  5V
B)  14.1V
C)  20V
D)  100V

Question 6

The impedance of a series RL circuit is found by adding the values of  XL and  R  using a phasor diagram.

Accepted Answer

A) True 
 B)False

Question 7

Figure 12<2	ext { Figure } 12 < 2 Figure 12<2 
-What change Would increase the power factor in Figure 12-2?

Accepted Answer

A)   increasing the value of the resistor 
B)   decreasing the source voltage
C)   decreasing the value of the resistor 
D)   increasing the source voltage

Question 8

Figure 12<1	ext { Figure } 12 < 1 Figure 12<1 
-If the frequency increases in Figure 12-1, inductance ________.

Accepted Answer

A)  increases
B)  decreases
C)  decreases to zero
D)  remains the same

Question 9

In an RL filter circuit, the cutoff frequency is defined as the frequency at Which:

Accepted Answer

A)  the outputVoltage drops to 33% of maximum.
B)  the outputVoltage drops to 70% of maximum.
C)  the outputVoltage is cutoff, with minimum or zero output.
D)  the outputVoltage drops to 66% of maximum. B

Question 10

Figure 12<1	ext { Figure } 12 < 1 Figure 12<1 
-If the frequency increases in Figure 12-1, the phase angle ________ and the impedance ________.

Accepted Answer

A)  decreases, decreases
B)  decreases, increases
C)  increases, decreases
D)  increases, increases  D

Question 11

Figure 12<1	ext { Figure } 12 < 1 Figure 12<1 
-What is the cut off frequency in Figure 12-1?

Accepted Answer

A)  63 Hz
B)  30 Hz
C)  25 Hz
D)  408 Hz  A

Question 12

In a series RL circuit, as the phase angle between the applied voltage and the total current increases, this is the same as:

Accepted Answer

A)  power factor increasing.
B)  true power decreasing.
C)  power factor decreasing.
D)  apparent power decreasing.

Question 13

Figure 12<2	ext { Figure } 12 < 2 Figure 12<2 
-What is the total impedance in Figure 12-2?

Accepted Answer

A)    5.71   kΩ\mathrm { k } \OmegakΩ 
B)    9.09   kΩ\mathrm { k } \OmegakΩ 
C)    1.07  kΩ\mathrm { k } \OmegakΩ 
D)    1.86   kΩ\mathrm { k } \OmegakΩ

Question 14

If a high-pass RL filterʹs cutoff frequency is 55 kHz, its bandwidth is theoretically ________.

Accepted Answer

A)  0 kHz
B)  55 kHz
C)  110 kHz
D)  infinite

Question 15

The overall phase angle of a parallel circuit with a resistance of  20 $\Omega$  and an inductive reactance of  25 $\mathrm { k } \Omega$  would be nearly 90 degrees.

Accepted Answer

A) True 
 B)False

Question 16

Figure 12<2	ext { Figure } 12 < 2 Figure 12<2 
-If the resistor decreases in Figure 12-2, the total current ________.

Accepted Answer

A)  remains the same
B)  decreases
C)  increases
D)  decreases to zero

Question 17

The source voltage always leads the total current in an RL circuit.

Accepted Answer

A) True 
 B)False

Question 18

Figure 12<2	ext { Figure } 12 < 2 Figure 12<2 
-If the resistance increases in Figure 12-2, the total current ________.

Accepted Answer

A)  decreases
B)  decreases to zero
C)  remains the same
D)  increases

Question 19

Figure 12<3	ext { Figure } 12 < 3 Figure 12<3 
-The circuit in Figure 12-3 is known as a ________ filter.

Accepted Answer

A)  band-pass
B)  low-pass
C)  high-pass
D)  notch

Question 20

Figure 12<1	ext { Figure } 12 < 1 Figure 12<1 
-If the operating frequency decreases in Figure 12-1, the current ________.

Accepted Answer

A)  decreases
B)  increases
C)  decreases to zero
D)  remains the same

Exam 12: Rl Circuits

If a low-pass RL filterʹs cutoff frequency is 20 kHz, its bandwidth is ________.

Correct Answer
verified

If a load is purely inductive and the reactive power is 10 V_AR, the apparent power is ________.

Correct Answer
verified

Power dissipated by the resistor in a parallel RL circuit can be increased With the addition of a capacitor in parallel.

Correct Answer
verified

An ohmmeter can be used to accurately test the impedance of an RL circuit.

Correct Answer
verified

If the true power is 10W and the reactive power is 10 V_AR, the apparent power is ________.

Correct Answer
verified

The impedance of a series RL circuit is found by adding the values of X_L and R using a phasor diagram.

Correct Answer
verified

Correct Answer
verified

$\text { Figure } 12 < 1 -If the frequency increases in Figure 12-1, inductance . A) increases B) decreases C) decreases to zero D) remains the same$ $\text { Figure } 12 < 1$ -If the frequency increases in Figure 12-1, inductance .

Correct Answer
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In an RL filter circuit, the cutoff frequency is defined as the frequency at Which:

Correct Answer
verified
B

Correct Answer
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D

$\text { Figure } 12 < 1 -What is the cut off frequency in Figure 12-1? A) 63 Hz B) 30 Hz C) 25 Hz D) 408 Hz$ $\text { Figure } 12 < 1$ -What is the cut off frequency in Figure 12-1?

Correct Answer
verified
A

In a series RL circuit, as the phase angle between the applied voltage and the total current increases, this is the same as:

Correct Answer
verified

$\text { Figure } 12 < 2 -What is the total impedance in Figure 12-2? A) 5.71 \mathrm { k } \Omega B) 9.09 \mathrm { k } \Omega C) 1.07 \mathrm { k } \Omega D) 1.86 \mathrm { k } \Omega$ $\text { Figure } 12 < 2$ -What is the total impedance in Figure 12-2?

Correct Answer
verified

If a high-pass RL filterʹs cutoff frequency is 55 kHz, its bandwidth is theoretically ________.

Correct Answer
verified

The overall phase angle of a parallel circuit with a resistance of 20 $\Omega$ and an inductive reactance of 25 $\mathrm { k } \Omega$ would be nearly 90 degrees.

Correct Answer
verified

$\text { Figure } 12 < 2 -If the resistor decreases in Figure 12-2, the total current . A) remains the same B) decreases C) increases D) decreases to zero$ $\text { Figure } 12 < 2$ -If the resistor decreases in Figure 12-2, the total current .

Correct Answer
verified

The source voltage always leads the total current in an RL circuit.

Correct Answer
verified

$\text { Figure } 12 < 2 -If the resistance increases in Figure 12-2, the total current . A) decreases B) decreases to zero C) remains the same D) increases$ $\text { Figure } 12 < 2$ -If the resistance increases in Figure 12-2, the total current .

Correct Answer
verified

$\text { Figure } 12 < 3 -The circuit in Figure 12-3 is known as a filter. A) band-pass B) low-pass C) high-pass D) notch$ $\text { Figure } 12 < 3$ -The circuit in Figure 12-3 is known as a filter.

Correct Answer
verified

$\text { Figure } 12 < 1 -If the operating frequency decreases in Figure 12-1, the current . A) decreases B) increases C) decreases to zero D) remains the same$ $\text { Figure } 12 < 1$ -If the operating frequency decreases in Figure 12-1, the current .

Correct Answer
verified

Exam 12: Rl Circuits

If a low-pass RL filterʹs cutoff frequency is 20 kHz, its bandwidth is ________.

Correct AnswerverifiedShow Answer

If a load is purely inductive and the reactive power is 10 VAR, the apparent power is ________.

Correct AnswerverifiedShow Answer

Power dissipated by the resistor in a parallel RL circuit can be increased With the addition of a capacitor in parallel.

Correct AnswerverifiedShow Answer

An ohmmeter can be used to accurately test the impedance of an RL circuit.

Correct AnswerverifiedShow Answer

If the true power is 10W and the reactive power is 10 VAR, the apparent power is ________.

Correct AnswerverifiedShow Answer

The impedance of a series RL circuit is found by adding the values of XL and R using a phasor diagram.

Correct AnswerverifiedShow Answer

Figure 12<2\text { Figure } 12 < 2 Figure 12<2 -What change Would increase the power factor in Figure 12-2?

Correct AnswerverifiedShow Answer

Figure 12<1\text { Figure } 12 < 1 Figure 12<1 -If the frequency increases in Figure 12-1, inductance ________.

Correct AnswerverifiedShow Answer

In an RL filter circuit, the cutoff frequency is defined as the frequency at Which:

Correct AnswerverifiedB

Figure 12<1\text { Figure } 12 < 1 Figure 12<1 -If the frequency increases in Figure 12-1, the phase angle ________ and the impedance ________.

Correct AnswerverifiedD

Figure 12<1\text { Figure } 12 < 1 Figure 12<1 -What is the cut off frequency in Figure 12-1?

Correct AnswerverifiedA

In a series RL circuit, as the phase angle between the applied voltage and the total current increases, this is the same as:

Correct AnswerverifiedShow Answer

Figure 12<2\text { Figure } 12 < 2 Figure 12<2 -What is the total impedance in Figure 12-2?

Correct AnswerverifiedShow Answer

If a high-pass RL filterʹs cutoff frequency is 55 kHz, its bandwidth is theoretically ________.

Correct AnswerverifiedShow Answer

The overall phase angle of a parallel circuit with a resistance of 20 Ω\OmegaΩ and an inductive reactance of 25 kΩ\mathrm { k } \OmegakΩ would be nearly 90 degrees.

Correct AnswerverifiedShow Answer

Figure 12<2\text { Figure } 12 < 2 Figure 12<2 -If the resistor decreases in Figure 12-2, the total current ________.

Correct AnswerverifiedShow Answer

The source voltage always leads the total current in an RL circuit.

Correct AnswerverifiedShow Answer

Figure 12<2\text { Figure } 12 < 2 Figure 12<2 -If the resistance increases in Figure 12-2, the total current ________.

Correct AnswerverifiedShow Answer

Figure 12<3\text { Figure } 12 < 3 Figure 12<3 -The circuit in Figure 12-3 is known as a ________ filter.

Correct AnswerverifiedShow Answer

Figure 12<1\text { Figure } 12 < 1 Figure 12<1 -If the operating frequency decreases in Figure 12-1, the current ________.

Correct AnswerverifiedShow Answer

Correct Answer
verified

If a load is purely inductive and the reactive power is 10 V_AR, the apparent power is ________.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

If the true power is 10W and the reactive power is 10 V_AR, the apparent power is ________.

Correct Answer
verified

The impedance of a series RL circuit is found by adding the values of X_L and R using a phasor diagram.

Correct Answer
verified

Correct Answer
verified

$\text { Figure } 12 < 1 -If the frequency increases in Figure 12-1, inductance . A) increases B) decreases C) decreases to zero D) remains the same$ $\text { Figure } 12 < 1$ -If the frequency increases in Figure 12-1, inductance .

Correct Answer
verified

Correct Answer
verified
B

Correct Answer
verified
D

$\text { Figure } 12 < 1 -What is the cut off frequency in Figure 12-1? A) 63 Hz B) 30 Hz C) 25 Hz D) 408 Hz$ $\text { Figure } 12 < 1$ -What is the cut off frequency in Figure 12-1?

Correct Answer
verified
A

Correct Answer
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$\text { Figure } 12 < 2 -What is the total impedance in Figure 12-2? A) 5.71 \mathrm { k } \Omega B) 9.09 \mathrm { k } \Omega C) 1.07 \mathrm { k } \Omega D) 1.86 \mathrm { k } \Omega$ $\text { Figure } 12 < 2$ -What is the total impedance in Figure 12-2?

Correct Answer
verified

Correct Answer
verified

The overall phase angle of a parallel circuit with a resistance of 20 $\Omega$ and an inductive reactance of 25 $\mathrm { k } \Omega$ would be nearly 90 degrees.

Correct Answer
verified

$\text { Figure } 12 < 2 -If the resistor decreases in Figure 12-2, the total current . A) remains the same B) decreases C) increases D) decreases to zero$ $\text { Figure } 12 < 2$ -If the resistor decreases in Figure 12-2, the total current .

Correct Answer
verified

Correct Answer
verified

$\text { Figure } 12 < 2 -If the resistance increases in Figure 12-2, the total current . A) decreases B) decreases to zero C) remains the same D) increases$ $\text { Figure } 12 < 2$ -If the resistance increases in Figure 12-2, the total current .

Correct Answer
verified

$\text { Figure } 12 < 3 -The circuit in Figure 12-3 is known as a filter. A) band-pass B) low-pass C) high-pass D) notch$ $\text { Figure } 12 < 3$ -The circuit in Figure 12-3 is known as a filter.

Correct Answer
verified

$\text { Figure } 12 < 1 -If the operating frequency decreases in Figure 12-1, the current . A) decreases B) increases C) decreases to zero D) remains the same$ $\text { Figure } 12 < 1$ -If the operating frequency decreases in Figure 12-1, the current .

Correct Answer
verified