Question 1

At what frequency will a 20 mH inductor have a reactance XL = 500  Ω\varOmegaΩ  ?

Accepted Answer

A)  62.8 Hz
B)  3980 Hz
C)  2210 Hz
D)  125 Hz
E)  8120 Hz

Question 2

The total amount of energy stored in an LC series circuit is 8.00 J.When the current through the inductor is equal to half its maximum value,how much energy is stored in the electric field?

Accepted Answer

A)  2.00 J
B)  4.00 J
C)  6.00 J
D)  8.00 J

Question 3

A 100 v resistor,a 20 mH inductor and a capacitor are connected in series with a time varying emf of 10.0 V and frequency 1000 Hz.The impedance of the circuit is 339  Ω\varOmegaΩ  .What is the capacitance of the capacitor?

Accepted Answer

A)  0.354 µF
B)  3.0 µF
C)  0.153 µF
D)  0.289 µF

Question 4

An LC circuit is driven by an AC source at what frequency if the inductor and capacitor have values of 1.5 mH and 22 nF,respectively,and if the rms voltage across each circuit element is half the supply rms voltage?

Accepted Answer

A)  0.17 MHz
B)  0.12 MHz
C)  28 kHz
D)  20 kHz

Question 5

In the circuit shown,R = 100 W,L = 50 mH,C = 10 mF,and the ideal AC emf source has a peak voltage of 120V.What angular frequency  ω\omegaω  should be used to produce the largest current in the resistor?

Accepted Answer

A)  6.3 rad/s
B)  22 rad/s
C)  45 rad/s
D)  2000 rad/s
E)  13000 rad/s

Question 6

An LRC oscillator circuit consists of a 50- Ω\varOmegaΩ  resistor and a 100 nF capacitor.What inductance is necessary for the decay rate of the circuit (the 1/e value) to be equal to the oscillation period?

Accepted Answer

A)  14.9 mH
B)  7.63 mH
C)  9.93 mH
D)  12.1 mH
E)  1.00 mH

Question 7

You want to make an AM radio that can receive electromagnetic waves of frequency 889 kHz.You have an 8- mH inductor.What capacitance would you choose for your radio?

Accepted Answer

A)  16 pF
B)  12 pF
C)  9 pF
D)  4 pF

Question 8

A series LRC circuit is driven by an ideal sinusoidal AC voltage generator with a peak emf of 12 V.If L = 30.0 mH,R = 200 ohms,and C = 0.040 mF,what is the average power dissipated in the resistor if the circuit is driven at the resonance frequency?

Accepted Answer

A)  0.016 W
B)  0.21 W
C)  0.36 W
D)  0.72 W
E)  770 W

Question 9

Determine the phase constant and the impedance of the RLC circuit shown in the figure when the frequency of the time-varying emf is 1 kHz,where C = 100  μ\muμ F,L = 10 mH,and R = 100  Ω\varOmegaΩ .  \circ  B) 58.5 \circ  C) 63 \circ  D) 27 \circ   " class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  31.5 ∘\circ∘ 
B)  58.5 ∘\circ∘ 
C)  63 ∘\circ∘ 
D)  27 ∘\circ∘

Question 10

A transformer has 1000 turns in its primary coil and 10000 in its secondary coil.If the primary is connected to a 12000-V alternating voltage,the voltage at the secondary will be

Accepted Answer

A)  12 V.
B)  120 V.
C)  1200 V.
D)  12,000 V.
E)  120,000 V.

Question 11

A series LRC circuit is driven by an ideal sinusoidal AC voltage generator with a peak emf of 12 V.If L = 30.0 mH,R = 200 ohms,and C = 0.040 mF,what is the average power dissipated in the resistor if the circuit is driven at a frequency equal to ten times the resonance frequency?

Accepted Answer

A)  0.013 W
B)  0.016 W
C)  0.21 W
D)  0.36 W
E)  0.72 W

Question 12

You are given three series RL circuits: circuit A has resistance R/2,inductance L;circuit B has resistance R,inductance L;and circuit C has resistance 2R and inductance L.Rank in order from largest to smallest quality factors,QA,QB, and QC for the resonant frequency 5 MHz.

Accepted Answer

A)  QA > QB > QC
B)  Qc > QB > QA
C)  QB > QC > QA
D)  QA > QC > QB

Question 13

What is the maximum current when a 220 mH inductor is connected to a 240 Vrms,50-Hz power supply?

Accepted Answer

A)  1.80 A
B)  3.47 A
C)  4.91 A
D)  2.15 A
E)  4.31 A

Question 14

What is the resonance frequency of the series RLC circuit shown in the figure,where C = 4  μ\muμ F,L = 5 mH,and R = 1 k Ω\varOmegaΩ ?

Accepted Answer

A)  226 Hz
B)  1.13 kHz
C)  33.9 kHz
D)  11.3 kHz

Question 15

An AC source with  Δ\DeltaΔ Vmax = 220 V and f = 60.0 Hz is connected to an RLC series combination.The resistance,R,inductance,L and capacitance,C of this circuit are 80.0  Ω\varOmegaΩ ,0.300 H,and 0.02 mF,respectively.The maximum current through the circuit is

Accepted Answer

A)    5.98 A. 
B)    2.75 A. 
C)    1.44 A. 
D)    2.67 A. 
E)    5.56 A.

Question 16

A transformer consists of 2000 coils in its primary core to 1000 coils in its secondary core.What is the ratio of power dissipated in the primary to the secondary?

Accepted Answer

A)  0.5
B)  0.707
C)  1
D)  1.414
E)  2

Question 17

A radio tuner has a capacitance of 25.0 nF,and an inductance of 3.00 mH.If the power in the circuit is 3.9 W when the signal produces an rms voltage across the antenna of 1.50 mV and it is at the resonance frequency,what is the resistance of the tuner?

Accepted Answer

A)  0.723  μ\muμΩ\varOmegaΩ 
B)  1.00  μ\muμΩ\varOmegaΩ 
C)  2.11  μ\muμΩ\varOmegaΩ 
D)  0.288  μ\muμΩ\varOmegaΩ 
E)  0.577  μ\muμΩ\varOmegaΩ

Question 18

A 5.00- μ\muμ F capacitor was fully charged by being connected to a 12.0-V battery.The fully charged capacitor is then connected to an RL series combination with R = 72.0  Ω\varOmegaΩ  and L= 0.500 H.Calculate the frequency of the damped oscillation of the circuit.

Accepted Answer

A)  1.00 * 102 Hz
B)  1.50 * 102 Hz
C)  2.00 * 102 Hz
D)  2.50 * 102 Hz
E)  3.00 * 102 Hz

Exam 30: Alternating Current Circuits

A 5.00- $\mu$ F capacitor was fully charged by being connected to a 12.0-V battery.The fully charged capacitor is then connected to an RL series combination with R = 72.0 $\varOmega$ and L= 0.500 H.Calculate the frequency of the damped oscillation of the circuit.

Correct Answer
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An LC circuit is driven by an AC source at what frequency if the inductor and capacitor have values of 1.5 mH and 22 nF,respectively,and if the rms voltage across each circuit element is half the supply rms voltage?

Correct Answer
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The total amount of energy stored in an LC series circuit is 8.00 J.When the current through the inductor is equal to half its maximum value,how much energy is stored in the electric field?

Correct Answer
verified

A transformer has 1000 turns in its primary coil and 10000 in its secondary coil.If the primary is connected to a 12000-V alternating voltage,the voltage at the secondary will be

Correct Answer
verified

What is the maximum current when a 220 mH inductor is connected to a 240 V_rms,50-Hz power supply?

Correct Answer
verified

You want to make an AM radio that can receive electromagnetic waves of frequency 889 kHz.You have an 8- mH inductor.What capacitance would you choose for your radio?

Correct Answer
verified

An AC source with $\Delta$ V_max = 220 V and f = 60.0 Hz is connected to an RLC series combination.The resistance,R,inductance,L and capacitance,C of this circuit are 80.0 $\varOmega$ ,0.300 H,and 0.02 mF,respectively.The maximum current through the circuit is

Correct Answer
verified

A transformer consists of 2000 coils in its primary core to 1000 coils in its secondary core.What is the ratio of power dissipated in the primary to the secondary?

Correct Answer
verified

A 100 v resistor,a 20 mH inductor and a capacitor are connected in series with a time varying emf of 10.0 V and frequency 1000 Hz.The impedance of the circuit is 339 $\varOmega$ .What is the capacitance of the capacitor?

Correct Answer
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A series LRC circuit is driven by an ideal sinusoidal AC voltage generator with a peak emf of 12 V.If L = 30.0 mH,R = 200 ohms,and C = 0.040 mF,what is the average power dissipated in the resistor if the circuit is driven at a frequency equal to ten times the resonance frequency?

Correct Answer
verified

Correct Answer
verified

You are given three series RL circuits: circuit A has resistance R/2,inductance L;circuit B has resistance R,inductance L;and circuit C has resistance 2R and inductance L.Rank in order from largest to smallest quality factors,Q_A,Q_B, and Q_C for the resonant frequency 5 MHz.

Correct Answer
verified

Correct Answer
verified

A radio tuner has a capacitance of 25.0 nF,and an inductance of 3.00 mH.If the power in the circuit is 3.9 W when the signal produces an rms voltage across the antenna of 1.50 mV and it is at the resonance frequency,what is the resistance of the tuner?

Correct Answer
verified

At what frequency will a 20 mH inductor have a reactance X_L = 500 $\varOmega$ ?

Correct Answer
verified

A series LRC circuit is driven by an ideal sinusoidal AC voltage generator with a peak emf of 12 V.If L = 30.0 mH,R = 200 ohms,and C = 0.040 mF,what is the average power dissipated in the resistor if the circuit is driven at the resonance frequency?

Correct Answer
verified

An LRC oscillator circuit consists of a 50- $\varOmega$ resistor and a 100 nF capacitor.What inductance is necessary for the decay rate of the circuit (the 1/e value) to be equal to the oscillation period?

Correct Answer
verified

Correct Answer
verified

Exam 30: Alternating Current Circuits

A 5.00- μ\muμ F capacitor was fully charged by being connected to a 12.0-V battery.The fully charged capacitor is then connected to an RL series combination with R = 72.0 Ω\varOmegaΩ and L= 0.500 H.Calculate the frequency of the damped oscillation of the circuit.

Correct AnswerverifiedShow Answer

An LC circuit is driven by an AC source at what frequency if the inductor and capacitor have values of 1.5 mH and 22 nF,respectively,and if the rms voltage across each circuit element is half the supply rms voltage?

Correct AnswerverifiedShow Answer

The total amount of energy stored in an LC series circuit is 8.00 J.When the current through the inductor is equal to half its maximum value,how much energy is stored in the electric field?

Correct AnswerverifiedShow Answer

A transformer has 1000 turns in its primary coil and 10000 in its secondary coil.If the primary is connected to a 12000-V alternating voltage,the voltage at the secondary will be

Correct AnswerverifiedShow Answer

What is the maximum current when a 220 mH inductor is connected to a 240 Vrms,50-Hz power supply?

Correct AnswerverifiedShow Answer

You want to make an AM radio that can receive electromagnetic waves of frequency 889 kHz.You have an 8- mH inductor.What capacitance would you choose for your radio?

Correct AnswerverifiedShow Answer

An AC source with Δ\DeltaΔ Vmax = 220 V and f = 60.0 Hz is connected to an RLC series combination.The resistance,R,inductance,L and capacitance,C of this circuit are 80.0 Ω\varOmegaΩ ,0.300 H,and 0.02 mF,respectively.The maximum current through the circuit is

Correct AnswerverifiedShow Answer

A transformer consists of 2000 coils in its primary core to 1000 coils in its secondary core.What is the ratio of power dissipated in the primary to the secondary?

Correct AnswerverifiedShow Answer

A 100 v resistor,a 20 mH inductor and a capacitor are connected in series with a time varying emf of 10.0 V and frequency 1000 Hz.The impedance of the circuit is 339 Ω\varOmegaΩ .What is the capacitance of the capacitor?

Correct AnswerverifiedShow Answer

A series LRC circuit is driven by an ideal sinusoidal AC voltage generator with a peak emf of 12 V.If L = 30.0 mH,R = 200 ohms,and C = 0.040 mF,what is the average power dissipated in the resistor if the circuit is driven at a frequency equal to ten times the resonance frequency?

Correct AnswerverifiedShow Answer

Determine the phase constant and the impedance of the RLC circuit shown in the figure when the frequency of the time-varying emf is 1 kHz,where C = 100 μ\muμ F,L = 10 mH,and R = 100 Ω\varOmegaΩ .

Correct AnswerverifiedShow Answer

You are given three series RL circuits: circuit A has resistance R/2,inductance L;circuit B has resistance R,inductance L;and circuit C has resistance 2R and inductance L.Rank in order from largest to smallest quality factors,QA,QB, and QC for the resonant frequency 5 MHz.

Correct AnswerverifiedShow Answer

In the circuit shown,R = 100 W,L = 50 mH,C = 10 mF,and the ideal AC emf source has a peak voltage of 120V.What angular frequency ω\omegaω should be used to produce the largest current in the resistor?

Correct AnswerverifiedShow Answer

A radio tuner has a capacitance of 25.0 nF,and an inductance of 3.00 mH.If the power in the circuit is 3.9 W when the signal produces an rms voltage across the antenna of 1.50 mV and it is at the resonance frequency,what is the resistance of the tuner?

Correct AnswerverifiedShow Answer

At what frequency will a 20 mH inductor have a reactance XL = 500 Ω\varOmegaΩ ?

Correct AnswerverifiedShow Answer

A series LRC circuit is driven by an ideal sinusoidal AC voltage generator with a peak emf of 12 V.If L = 30.0 mH,R = 200 ohms,and C = 0.040 mF,what is the average power dissipated in the resistor if the circuit is driven at the resonance frequency?

Correct AnswerverifiedShow Answer

An LRC oscillator circuit consists of a 50- Ω\varOmegaΩ resistor and a 100 nF capacitor.What inductance is necessary for the decay rate of the circuit (the 1/e value) to be equal to the oscillation period?

Correct AnswerverifiedShow Answer

What is the resonance frequency of the series RLC circuit shown in the figure,where C = 4 μ\muμ F,L = 5 mH,and R = 1 k Ω\varOmegaΩ ?

Correct AnswerverifiedShow Answer

A 5.00- $\mu$ F capacitor was fully charged by being connected to a 12.0-V battery.The fully charged capacitor is then connected to an RL series combination with R = 72.0 $\varOmega$ and L= 0.500 H.Calculate the frequency of the damped oscillation of the circuit.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

What is the maximum current when a 220 mH inductor is connected to a 240 V_rms,50-Hz power supply?

Correct Answer
verified

Correct Answer
verified

An AC source with $\Delta$ V_max = 220 V and f = 60.0 Hz is connected to an RLC series combination.The resistance,R,inductance,L and capacitance,C of this circuit are 80.0 $\varOmega$ ,0.300 H,and 0.02 mF,respectively.The maximum current through the circuit is

Correct Answer
verified

Correct Answer
verified

A 100 v resistor,a 20 mH inductor and a capacitor are connected in series with a time varying emf of 10.0 V and frequency 1000 Hz.The impedance of the circuit is 339 $\varOmega$ .What is the capacitance of the capacitor?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

You are given three series RL circuits: circuit A has resistance R/2,inductance L;circuit B has resistance R,inductance L;and circuit C has resistance 2R and inductance L.Rank in order from largest to smallest quality factors,Q_A,Q_B, and Q_C for the resonant frequency 5 MHz.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

At what frequency will a 20 mH inductor have a reactance X_L = 500 $\varOmega$ ?

Correct Answer
verified

Correct Answer
verified

An LRC oscillator circuit consists of a 50- $\varOmega$ resistor and a 100 nF capacitor.What inductance is necessary for the decay rate of the circuit (the 1/e value) to be equal to the oscillation period?

Correct Answer
verified

Correct Answer
verified