E5A: Resonance and Q: characteristics of resonant circuits: series and parallel resonance; Q; half-power bandwidth; phase relationships in reactive circuits
E5A01:
What can cause the voltage across reactances in series to be larger than the voltage applied to them?
Resonance
Capacitance
Conductance
Resistance
E5A02:
What is resonance in an electrical circuit?
The frequency at which the capacitive reactance equals the inductive reactance
The highest frequency that will pass current
The lowest frequency that will pass current
The frequency at which the reactive impedance equals the resistive impedance
E5A03:
What is the magnitude of the impedance of a series R-L-C circuit at resonance?
Approximately equal to circuit resistance
High, as compared to the circuit resistance
Approximately equal to capacitive reactance
Approximately equal to inductive reactance
E5A04:
What is the magnitude of the impedance of a circuit with a resistor, an inductor and a capacitor all in parallel, at resonance?
Approximately equal to circuit resistance
Approximately equal to inductive reactance
Low, as compared to the circuit resistance
Approximately equal to capacitive reactance
E5A05:
What is the magnitude of the current at the input of a series R-L-C circuit as the frequency goes through resonance?
Maximum
Minimum
R/L
L/R
E5A06:
What is the magnitude of the circulating current within the components of a parallel L-C circuit at resonance?
It is at a maximum
It is at a minimum
It equals 1 divided by the quantity [ 2 multiplied by Pi, multiplied by the square root of ( inductance "L" multiplied by capacitance "C" ) ]
It equals 2 multiplied by Pi, multiplied by frequency "F", multiplied by inductance "L"
E5A07:
What is the magnitude of the current at the input of a parallel R-L-C circuit at resonance?
Minimum
Maximum
R/L
L/R
E5A08:
What is the phase relationship between the current through and the voltage across a series resonant circuit?
The voltage and current are in phase
The voltage leads the current by 90 degrees
The current leads the voltage by 90 degrees
The voltage and current are 180 degrees out of phase
E5A09:
What is the phase relationship between the current through and the voltage across a parallel resonant circuit?
The voltage and current are in phase
The voltage leads the current by 90 degrees
The current leads the voltage by 90 degrees
The voltage and current are 180 degrees out of phase
E5A10:
What is the half-power bandwidth of a parallel resonant circuit that has a resonant frequency of 1.8 MHz and a Q of 95?
18.9 kHz
1.89 kHz
94.5 kHz
9.45 kHz
E5A11:
What is the half-power bandwidth of a parallel resonant circuit that has a resonant frequency of 7.1 MHz and a Q of 150?
47.3 kHz
157.8 Hz
315.6 Hz
23.67 kHz
E5A12:
What is the half-power bandwidth of a parallel resonant circuit that has a resonant frequency of 3.7 MHz and a Q of 118?
31.4 kHz
436.6 kHz
218.3 kHz
15.7 kHz
E5A13:
What is the half-power bandwidth of a parallel resonant circuit that has a resonant frequency of 14.25 MHz and a Q of 187?
76.2 kHz
38.1 kHz
1.332 kHz
2.665 kHz
E5A14:
What is the resonant frequency of a series RLC circuit if R is 22 ohms, L is 50 microhenrys and C is 40 picofarads?
3.56 MHz
44.72 MHz
22.36 MHz
1.78 MHz
E5A15:
What is the resonant frequency of a series RLC circuit if R is 56 ohms, L is 40 microhenrys and C is 200 picofarads?
1.78 MHz
3.76 MHz
11.18 MHz
22.36 MHz
E5A16:
What is the resonant frequency of a parallel RLC circuit if R is 33 ohms, L is 50 microhenrys and C is 10 picofarads?
7.12 MHz
23.5 MHz
23.5 kHz
7.12 kHz
E5A17:
What is the resonant frequency of a parallel RLC circuit if R is 47 ohms, L is 25 microhenrys and C is 10 picofarads?
10.1 MHz
63.2 MHz
10.1 kHz
63.2 kHz
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