Question 1

-If the resistance decreases in Figure 13 -1, the impedance .

Accepted Answer

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

Question 2

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

Question 3

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

Accepted Answer

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

Question 4

In a series RLC circuit at resonance:

Accepted Answer

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

Question 5

What is the total current in a parallel resonant circuit if its impedance is 0.22 MΩ, the Q is 100 and the source voltage is 100 V?

Accepted Answer

A) 4.55 mA 
B) 0.455 mA 
C) 45.5 mA 
D) 0.0455 mA 
A) 4.55 mA 
B) 0.455 mA 
C) 45.5 mA 
D) 0.0455 mA

Question 6

In a resonant circuit, as Q increases the bandwidth decreases.

Accepted Answer

A) True 
 B)False

Question 7

What is the source voltage in a series resonant circuit if VC = 150 V, VL = 150 V and VR = 50 V?

Accepted Answer

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

Question 8

If a tank circuit is operating above resonance, it is in nature.

Accepted Answer

A) capacitive 
B) positive 
C) inductive 
D) resistive 
A) capacitive 
B) positive 
C) inductive 
D) resistive

Question 9

What is the resonant impedance of a series RLC circuit with a 15 mH inductor, 0.015 µF capacitor and 80 Ω resistor?

Accepted Answer

A) 15 kΩ 
B) 30 Ω 
C) 80 Ω 
D) 0 Ω 
A) 15 kΩ 
B) 30 Ω 
C) 80 Ω 
D) 0 Ω

Question 10

What is the bandwidth of a resonant circuit if its resonant frequency is 14.2 MHz, the inductive reactance is 3.5 kΩ and the coil's resistance is 8 ohm?

Accepted Answer

A) 14.2 MHz 
B) 32.5 kHz 
C) 28.4 kHz 
D) 2285 Hz 
A) 14.2 MHz 
B) 32.5 kHz 
C) 28.4 kHz 
D) 2285 Hz

-If the resistance decreases in Figure 13 -1, the impedance .

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?

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

In a series RLC circuit at resonance:

What is the total current in a parallel resonant circuit if its impedance is 0.22 MΩ, the Q is 100 and the source voltage is 100 V?

In a resonant circuit, as Q increases the bandwidth decreases.

What is the source voltage in a series resonant circuit if VC = 150 V, VL = 150 V and VR = 50 V?

If a tank circuit is operating above resonance, it is in nature.

What is the resonant impedance of a series RLC circuit with a 15 mH inductor, 0.015 µF capacitor and 80 Ω resistor?

What is the bandwidth of a resonant circuit if its resonant frequency is 14.2 MHz, the inductive reactance is 3.5 kΩ and the coil's resistance is 8 ohm?

Systems, Quantities, and Units

Voltage, Current, and Resistance

Ohms Law, Energy, and Power

Series Circuits

Parallel Circuits

Series-Parallel Circuits

Magnetism and Electromagnetism

Introduction to Alternating Current and Voltage

Capacitors

Rccircuits

Inductors

Rlcircuits

Transformers

Time Response of Reactive Circuits

Filters

Exam 13: Rlccircuits and Resonance

-If the resistance decreases in Figure 13 -1, the impedance .

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?

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

In a series RLC circuit at resonance:

What is the total current in a parallel resonant circuit if its impedance is 0.22 MΩ, the Q is 100 and the source voltage is 100 V?

In a resonant circuit, as Q increases the bandwidth decreases.

What is the source voltage in a series resonant circuit if VC = 150 V, VL = 150 V and VR = 50 V?

If a tank circuit is operating above resonance, it is in nature.

What is the resonant impedance of a series RLC circuit with a 15 mH inductor, 0.015 µF capacitor and 80 Ω resistor?

What is the bandwidth of a resonant circuit if its resonant frequency is 14.2 MHz, the inductive reactance is 3.5 kΩ and the coil's resistance is 8 ohm?

Systems, Quantities, and Units

Voltage, Current, and Resistance

Ohms Law, Energy, and Power

Series Circuits

Parallel Circuits

Series-Parallel Circuits

Magnetism and Electromagnetism

Introduction to Alternating Current and Voltage

Capacitors

Rccircuits

Inductors

Rlcircuits

Transformers

Time Response of Reactive Circuits

Filters