Question 1

The capacitorʹs resistive effects are significant when considering the   of an RLC circuit.

Accepted Answer

A) True 
 B)False  False

Question 2

What is the source voltage in a series resonant circuit if

Accepted Answer

A) 300 V 
B) 50 V 
C) 350 V 
D) 150 V 
A) 300 V 
B) 50 V 
C) 350 V 
D) 150 V B

Question 3

Between the lower and upper critical frequencies of a band-pass filter:

Accepted Answer

A) the frequencies pass a maximum level. 
B) the frequencies pass at 70% to their maximum levels. 
C) the frequencies pass a minimum level. 
D) the frequencies pass at 30% to their maximum levels. 
A) the frequencies pass a maximum level. 
B) the frequencies pass at 70% to their maximum levels. 
C) the frequencies pass a minimum level. 
D) the frequencies pass at 30% to their maximum levels. B

Question 4

-If frequency increases in Figure 13-1, the impedance ________ and the current ________.

Accepted Answer

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

Question 5

Current leads in a series RLC circuit with more capacitive reactance than inductive reactance.

Accepted Answer

A) True 
 B)False

Question 6

What is the power at   in a resonant circuit that delivers 120 W?

Accepted Answer

A)    
B) 84.8 W 
C) 60 W 
D) 17 W at both frequencies 
A)    
B) 84.8 W 
C) 60 W 
D) 17 W at both frequencies

Question 7

If a tuned tank circuit has a very narrow bandwidth, its Q is probably ________.

Accepted Answer

A) very low 
B) below 10 
C) about 10 
D) very high 
A) very low 
B) below 10 
C) about 10 
D) very high

Question 8

In a series RLC circuit at resonance:

Accepted Answer

A) the impedance is mostly resistive. 
B)    equals   and they cancel. 
C) the impedance Z is at minimum. 
D) all of these. 
A) the impedance is mostly resistive. 
B)    equals   and they cancel. 
C) the impedance Z is at minimum. 
D) all of these.

Question 9

-As the frequency approaches the resonant frequency in Figure 13-1, the VR

Accepted Answer

A) becomes increasingly unstable 
B) increases 
C) remains the same 
D) decreases 
A) becomes increasingly unstable 
B) increases 
C) remains the same 
D) decreases

Question 10

At resonance, a parallel RLC circuit is inductive.

Accepted Answer

A) True 
 B)False

Question 11

If a tuned tank circuit has a very wide bandwidth, its   might be ________.

Accepted Answer

A) about 10 
B) about 100 
C) very high 
D) very low 
A) about 10 
B) about 100 
C) very high 
D) very low

Question 12

In a parallel resonant RLC circuit, the impedance is ________ and the total current is ________.

Accepted Answer

A) maximum. maximum 
B) minimum, minimum 
C) minimum, maximum 
D) maximum, minimum 
A) maximum. maximum 
B) minimum, minimum 
C) minimum, maximum 
D) maximum, minimum

Question 13

-If the resistor shorts in Figure 13-2, the current ________.

Accepted Answer

A) increases 
B) continues, but the circuit would not be resonant 
C) decreases 
D) does not change 
A) increases 
B) continues, but the circuit would not be resonant 
C) decreases 
D) does not change

Question 14

-Find the voltage across the capacitor in Figure 13-1.

Accepted Answer

A) 10.7 V 
B) 0.633 V 
C) -4.9 V 
D) 5.37 V 
A) 10.7 V 
B) 0.633 V 
C) -4.9 V 
D) 5.37 V

Question 15

-What is the resonant frequency of a tank circuit with a 50 mH inductor and C = 256 pF capacitor?

Accepted Answer

A) 44.5 kHz 
B) 44.5 Hz 
C) 445 kHz 
D) 4.45 kHz 
A) 44.5 kHz 
B) 44.5 Hz 
C) 445 kHz 
D) 4.45 kHz

Question 16

The resonant frequency of a tank circuit with a 0.150 mH inductor and 300 pF capacitor is ________.

Accepted Answer

A) 1.65 MHz 
B) 750 kHz 
C) 6.05 MHz 
D) 347 kHz 
A) 1.65 MHz 
B) 750 kHz 
C) 6.05 MHz 
D) 347 kHz

Question 17

-If the frequency decreases in Figure 13-1, the impedance ________ and the phase angle ________.

Accepted Answer

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

Question 18

The output voltage of a circuit at 70.7% of its maximum level measured in dB is:

Accepted Answer

A) -3 dB. 
B) -7 db. 
C) 7 dB. 
D) 3 dB. 
A) -3 dB. 
B) -7 db. 
C) 7 dB. 
D) 3 dB.

Question 19

The selectivity of a given band-pass filter has degraded significantly, yet the fr is within tolerance. Which of the following could have caused this?

Accepted Answer

A) The inductance has increased. 
B) The load has opened. 
C) The capacitance has increased. 
D) none of the above 
A) The inductance has increased. 
B) The load has opened. 
C) The capacitance has increased. 
D) none of the above

Question 20

A resonant RLC circuit is said to be very selective if its   is very low.

Accepted Answer

A) True 
 B)False

Exam 13: Inductors

The capacitorʹs resistive effects are significant when considering the of an RLC circuit.

What is the source voltage in a series resonant circuit if

Between the lower and upper critical frequencies of a band-pass filter:

-If frequency increases in Figure 13-1, the impedance ________ and the current ________.

Current leads in a series RLC circuit with more capacitive reactance than inductive reactance.

What is the power at in a resonant circuit that delivers 120 W?

If a tuned tank circuit has a very narrow bandwidth, its Q is probably ________.

In a series RLC circuit at resonance:

-As the frequency approaches the resonant frequency in Figure 13-1, the VR

At resonance, a parallel RLC circuit is inductive.

If a tuned tank circuit has a very wide bandwidth, its might be ________.

In a parallel resonant RLC circuit, the impedance is ________ and the total current is ________.

-If the resistor shorts in Figure 13-2, the current ________.

-Find the voltage across the capacitor in Figure 13-1.

-What is the resonant frequency of a tank circuit with a 50 mH inductor and C = 256 pF capacitor?

The resonant frequency of a tank circuit with a 0.150 mH inductor and 300 pF capacitor is ________.

-If the frequency decreases in Figure 13-1, the impedance ________ and the phase angle ________.

The output voltage of a circuit at 70.7% of its maximum level measured in dB is:

The selectivity of a given band-pass filter has degraded significantly, yet the fr is within tolerance. Which of the following could have caused this?

A resonant RLC circuit is said to be very selective if its is very low.

Quantities and Units

Voltage, Current, and Resistance

Ohms Law

Energy and Power

Series Circuits

Parallel Circuits

Series-Parallel Circuits

Circuit Theorems and Conversions

Branch, Loop, and Node Analyses

Magnetism and Electromagnetism

Introduction to Alternating Current and Voltage

Capacitors

Transformers

RC Circuits

RL Circuits

RlC Circuits and Resonance

Passive Filters

Circuit Theorems in Ac Analysis

Time Response of Reactive Circuits

Three-Phase Systems in Power Applications

Filters

-If frequency increases in Figure 13-1, the impedance and the current .

In a parallel resonant RLC circuit, the impedance is and the total current is .

-If the frequency decreases in Figure 13-1, the impedance and the phase angle .