An {image} series circuit has {image} , {image} , and {image} . For what angular frequency of an ac voltage is the current flow maximum? - PowerPoint PPT Presentation

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An {image} series circuit has {image} , {image} , and {image} . For what angular frequency of an ac voltage is the current flow maximum?

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Title: An {image} series circuit has {image} , {image} , and {image} . For what angular frequency of an ac voltage is the current flow maximum?


1
An image series circuit has image , image ,
and image . For what angular frequency of an ac
voltage is the current flow maximum?
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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2
If an image resistor, a image capacitor, and
an image inductor are connected in series with
a image volts source, what is the maximum
current delivered by the source?
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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3
The voltage image is applied to a series
image circuit, with image , image , and
image . What is the impedance image and the
phase angle image ?
  1. image , image
  2. image , image
  3. image , image
  4. image , image
  5. image , image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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4
Find the resonant frequency for a series image
circuit where image , image , and image .
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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5
The inductance of a tuning circuit of an AM radio
is 4.4 mH. Find the capacitance of the circuit
required for reception at 1,600 kHz.
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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6
The input to an image series circuit is image
. What is the current in the circuit?
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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7
An LC circuit is to have resonant oscillations at
4.6 MHz. Find the value of a capacitor which will
work with a 1.2-mH inductor.
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
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8
A 0.6-H inductor is connected into a 110 V-rms
50-Hz voltage source, with an ammeter in series.
What is the rms value of the current through the
inductor?
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
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9
A image capacitor is plugged into a image
image voltage source, with an ammeter in
series. What is the rms value of the current
through the capacitor?
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
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10
A image capacitor in series with a image
resistor is connected to a image ac source.
Calculate the impedance of the circuit.
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
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11
At what frequency will a image inductor have a
reactance image ?
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
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12
At what frequency will a image capacitor have a
reactance image ?
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
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13
Which of the following is the inductive reactance
image ?
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
14
A 230,000 V-rms powerline carries an average
power image a distance of 220 km . If the total
resistance of the cables is 10 ohms, what is the
resistive power loss?
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
15
A high-voltage powerline operates at 230,000
V-rms and carries an rms current of 420 A . If
the resistance of the cable is image , what is
the resistive power loss in 190 km of the
powerline?
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
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16
An incandescent light bulb is rated at 75 Watts
when plugged into a 110 V-rms household outlet.
Calculate the resistance of the filament and the
rms current.
  1. image , image
  2. image , image
  3. image , image
  4. image , image
  5. image , image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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17
The driving voltage is image . Which of the
following is the current through the resistor?
image
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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18
Which of the following is the rms current from
the voltage source? image
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
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19
Which of the following is the phase angle between
image and image for the parallel image
circuit seen below? image
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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20
When the average power input to a series
alternating current circuit is minimum...
  1. image and the circuit contains a resistor, an
    inductor and a capacitor.
  2. There are only a resistor and inductor in the
    circuit.
  3. There is only a resistor in the circuit.
  4. There are only a resistor and capacitor in the
    circuit.
  5. There is only a(n) capacitor in the circuit.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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21
Suppose the alternating current frequency in a
series RLC circuit is halved. What can we
conclude?
  1. The inductive reactance is halved and the
    capacitive reactance is halved.
  2. The reactance of the circuit remains the same.
  3. The inductive reactance is doubled and the
    capacitive reactance is doubled.
  4. The inductive reactance is halved and the
    capacitive reactance is doubled.
  5. The inductive reactance is doubled and the
    capacitive reactance is halved.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
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22
A image ac generator with a peak voltage of
image drives a series image circuit with
image and image . What is the power factor,
image ?
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
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23
A image ac generator with a peak voltage of
image drives a series image circuit with
image and image . What is the power factor,
image ?
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
24
A image ac generator with a peak voltage of
image drives a series image circuit with
image and image . What is the impedance?
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
25
A image ac generator with a peak voltage of
image drives a series image circuit with
image and image . What is the impedance?
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
26
A image ac generator with a peak voltage of
image drives a series image circuit with
image and image . What is the peak current in
the circuit?
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
27
A image ac generator with a peak voltage of
image drives a series image circuit with
image and image . What is the peak current in
the circuit?
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
28
Which of the following is the impedance of the
parallel image circuit seen below? image
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
29
An ideal step-up transformer receives power
input, image , and has image turns in the
primary and image turns in the secondary coil.
Which of the following is the power output,
image ?
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
30
Which of the following is the total impedance
image of an image circuit driven by an ac
voltage source at angular frequency image ?
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
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31
An alternating current circuit has resistance
image , inductance image and capacitance
image in series with a voltage source. Which
statement is correct?
  1. The voltage across the resistor leads the voltage
    across the capacitor by image .
  2. Both voltages lag the voltage across the resistor
    by image .
  3. The voltage across the resistor leads the voltage
    across the inductor by image .
  4. The voltage across the inductor leads the voltage
    across the capacitor by image .
  5. The voltage across the inductor leads the voltage
    across the resistor by image .

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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41 42 43 44 45 46 47 48 49 50
32
Determine the rms voltage drop across the
inductor in the circuit. applet
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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33
If image , image , and image , what is the
resonant frequency for the parallel RLC-circuit?
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
34
Determine the rms voltage drop across the
resistor in the circuit. applet
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
35
A image capacitor in an image circuit made
entirely of superconducting materials image is
charged to image . Then a superconducting
switch is closed. At image , plate 1 is
positively charged and plate 2 is negatively
charged. At a later time, image . What is
image at that time? image
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
36
A primary current of 5 A exists in an ideal
iron-core transformer at a primary voltage of 150
volts. If the current in the secondary is 0.76 A,
calculate the output voltage.
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
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37
Calculate image for the circuit if image ,
image and image . image
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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38
An ideal step-down transformer has 190 primary
turns and 53 secondary turns. If 400 volts (rms)
is placed across the primary, what is the current
in the secondary when the load resistance is 6
ohms?
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
39
A step-up transformer has an input voltage of 100
V (rms) There are 160 turns on the primary and
1,900 on the secondary. What is the output
voltage?
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
40
Determine the resonant frequency of the circuit.
applet
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
41
The primary winding of an electric train
transformer has 420 turns and the secondary has
45. If the input voltage is 140 V (rms) what is
the output voltage?
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
42
Which of the following is the capacitive
reactance image ?
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
43
A transformer is designed to increase the 35
kV-rms output of a generator to the
transmission-line voltage of 308 kV-rms. If the
primary winding has 74 turns, how many turns must
the secondary have?
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
44
Determine the rms current for the circuit.
applet
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
45
A series image circuit has an impedance of
image and a resistance of image . What
average power is delivered to this circuit when
image ?
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
46
An electric heater draws an average power of 880
Watts when plugged into a 110 V-rms outlet.
Calculate the resistance of the heater and the
rms current.
  1. image , image
  2. image , image
  3. image , image
  4. image , image
  5. image , image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
47
What is the average power dissipation in an
image series circuit with image , image ,
image when driven at resonance by a image
source?
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
48
What is the average power dissipation in a series
image circuit if image , image , and
image ?
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
49
Determine the impedance for the circuit. applet
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
50
All three circuits shown below have image ,
image and emf image . Which statement
regarding the angular resonance frequencies
image , image and image is correct? applet
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
51
A current image amperes flows in a series
image circuit in which image and image .
What is the average power loss?
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
52
Determine the rms voltage drop across the
capacitor in the circuit. applet
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
53
An ac generator with peak voltage 150 volts is
placed across a image resistor. What is the
average power dissipated?
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
54
Determine the rms voltage for the circuit.
applet
  1. image
  2. image
  3. image
  4. image
  5. image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
55
Consider the voltage phasor in the figure below,
shown at three instants of time. image Choose
the part of the figure that represents the
instant of time at which the instantaneous value
of the voltage has the largest magnitude.
  1. (a)
  2. (b)
  3. (c)

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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56
For the voltage phasor in the figure below,
choose the part of the figure that represents the
instant of time at which the instantaneous value
of the voltage has the smallest magnitude. image
  1. (a)
  2. (b)
  3. (c)

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
57
Which of the following statements might be true
for a resistor connected to a sinusoidal AC
source?
  1. image and image
  2. image and image
  3. image and image
  4. image and image

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
58
Consider the AC circuit in the figure below. The
frequency of the AC source is adjusted while its
voltage amplitude is held constant. image The
light bulb will glow the brightest at _____.
  1. high frequencies
  2. low frequencies
  3. the brightness will be the same at all
    frequencies.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
59
Consider the AC circuit in the figure below. The
frequency of the AC source is adjusted while its
voltage amplitude is held constant. image The
light bulb will glow the brightest at _____.
  1. high frequencies
  2. low frequencies
  3. the brightness will be same at all frequencies.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
60
Consider the AC circuit in the figure below. The
frequency of the AC source is adjusted while its
voltage amplitude is held constant. image The
light bulb will glow the brightest at _____.
  1. high frequencies
  2. low frequencies
  3. the brightness will be same at all frequencies.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
61
An AC source drives an image circuit with a
fixed voltage amplitude. If the driving frequency
is image the circuit is more capacitive than
inductive and the phase angle is image If the
driving frequency is image the circuit is more
inductive than capacitive and the phase angle is
image The largest amount of power is delivered
to the circuit at _____.
  1. image
  2. image
  3. The same amount of power is delivered at both
    frequencies.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
62
The impedance of a series image circuit at
resonance is _____.
  1. larger than image
  2. less than image
  3. equal to image
  4. impossible to determine

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
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63
An airport metal detector is essentially a
resonant circuit. The portal you step through is
an inductor (a large loop of conducting wire)
within the circuit. The frequency of the circuit
is tuned to its resonance frequency when there is
no metal in the inductor. Any metal on your body
increases the effective inductance of the loop
and changes the current in it. If you want the
detector to detect a small metallic object, the
circuit should have _____.
  1. a high quality factor
  2. a low quality factor

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