- Find the total impedance of the circuit in Figure 13–71. 5 V f= 12 kHz R 100 Ω L 15 mH C 0.022 μF FIGURE 13-71
- Draw the waveforms for Vs, VR, and VL in Figure 12–48. Show the proper phase relationships. V 1 V R www 47 60 Hz FIGURE 12-48 lll L 100 mH
- What is the impedance for the circuit in Figure 12–50? Vs 1.5 VI f=2 kHz (2) FIGURE 12-50 lll L 800 με Hl₁ R 12 Ω
- Find the total current and each branch current in Figure 12–51. V₂ 10 V 2 FIGURE 12–51 Μ R 2.2 ΚΩ Il ell XL 3.5 ΚΩ
- What is the admittance of the circuit in Figure 12–51 if the frequency is doubled? V. S 10 V FIGURE 12-51 Μ R ´ 2.2 ΚΩ lll X₁ 3.5 ΚΩ
- What is the admittance of the circuit in Figure 12–51? V₂ 10 V FIGURE 12-51 www R 2.2 ΚΩ ell XL 3.5 ΚΩ
- Find the current in each branch and the total current in Figure 12–54. FIGURE 12-54 R₁ 220 Ω V₂ 25 V f = 100 kHz L 1.0 mH R₂ 1500 Ω
- What is the power factor in Figure 12–51? V₂ 10 V FIGURE 12–51 Μ R 2.2 ΚΩ XL 3.5 ΚΩ
- At what frequency does XL equal R in Figure 12–50? Vs 1.5 V f = 2 kHz 2 FIGURE 12-50 L 800 ΜΗ www R 12 Q2
- Is the circuit in Figure 12–54 predominantly resistive or predominantly inductive? FIGURE 12-54 R₁ 220 Ω Vs 25 V f = 100 kHz L 1.0 mH R₂ 1500 Ω
- Determine the voltage across each element in Figure 12–54. FIGURE 12-54 R₁ www 220 Ω V₂ 25 V f = 100 kHz L 1.0 mH R₂ 1500 Ω
- Draw the voltage phasor diagram for the circuit in Figure 12–55 for a frequency of 500 Hz. 5 V O R 150 ell L 100 mH FIGURE 12-55
- Plot the response curve for the circuit in Figure 12–49. Show the output voltage versus frequency in 200 Hz increments from 0 to 1200 Hz. V 5 V L m 100 mH FIGURE 12-49 R 150
- Determine if the voltage reading on the DMM in Figure 12–57 is correct or not. Explain your answer. V₂ 10 V₁ rms FIGURE 12-57 R www 10 ΚΩ ell XL = 10
- Determine the voltage across the inductors in Figure 12–58. R₁ www 56 Ω V₁ 25 V f = 400 Hz FIGURE 12-58 R3 www 33 02 R₂ 22 (2 lll L₁ 50 mH ell L2 50 mH
- Find the total current in Figure 12–58. R₁ www 56 Ω V₂ 25 V f = 400 Hz FIGURE 12-58 www R3 www 33 02 R₂ 22 (2 lll 4₁ 50 mH ell 4₂2 50 mH
- Find the impedance in Figure 13–65. R Μ 4.7 ΚΩ XL 8.0 ΚΩ Χε 1 3.5 ΚΩ FIGURE 13–65
- For the circuit in Figure 13–65, find Itot, VR, VL, and VC. 4V R Μ 4.7 ΚΩ XL 8.0 ΚΩ Xc 3.5 ΚΩ FIGURE 13-65
- If the frequency of the source voltage in Figure 13–65 is doubled from the value that produces the indicated reactances, how does the impedance change? 4V R Μ 4.7 ΚΩ XL 8.0 ΚΩ Χε 3.5
- Find XL, XC, Z, and I at the resonant frequency in Figure 13–67. FIGURE 13-67 V₂ 12 V R www 220 Ω L m 1.0 mH C 47 pF
- Analyze the circuit in Figure 13–66 for the following (f = 25 kHz):(a) Itot (b) Ptrue (c) Pr (d) Pa 12 V R₁ www 220 02 R₂ www 390 Ω L₁ m 42 m 0.5 mH 1.0 mH C₁ 0.01
- Draw the voltage phasor diagram for the circuit in Figure 13–65. 4V R 4.7 XL 800 8.0 H 3.5 FIGURE 13-65
- For the circuit in Figure 13–65, is the resonant frequency higher or lower than the value indicated by the reactances? 4V Ο R 4.7 ΚΩ XL 8000 8.0 ΚΩ Χ 3.5 ΚΩ FIGURE 13–65
- For the circuit in Figure 13–67, determine the voltage across R at resonance. FIGURE 13-67 V₂ 12 V R www 220 02 L m 1.0 mH 47 pF
- Assuming that the coils in Figure 13–69 have a winding resistance of 10 Ω, find the bandwidth for each filter. (2) L g 12 mH 0.01 με FIGURE 13–69 R 75 Ω (b) L 800 2.0 mH 0.022 με R 22 Ω
- What is the value of the current at the half-power points in Figure 13–68? FIGURE 13-68 Vs 3.0 V R www 39 Ω 1.5 nF L m 82 μΗ
- For the RLC circuit in Figure 13–68, determine the resonant frequency and the cutoff frequencies. FIGURE 13–68 V₂ 3.0 V R 39 Ω 1.5 nF L 800 82 μΗ
- Is the circuit in Figure 13–71 capacitive or inductive? Explain. 5 V f = 12 kHz www R 100 Ω L 15 mH C 0.022 μF FIGURE 13-71
- For the circuit in Figure 13–71, find all the currents and voltages. Vs 5 V f = 12 kHz R 100 Ω lll L 15 mH C 0.022 μF FIGURE 13-71
- A certain series resonant circuit has a maximum current of 50 mA and a VL of 100 V. The source voltage is 10 V. What is Z? What are XL and XC?
- Determine the resonant frequency for each filter in Figure 13–69. Are these filters band-pass or band-stop types? (a) L m 12 mH C 0.01 μF FIGURE 13-69 R 75 Ω (b) L m 2.0 mH C 0.022 μF R 22 Ω
- Find the total impedance for the circuit in Figure 13–72. Vs 5 V 10 kHz + m L 10 mH R 80 Ω C 15 nF FIGURE 13-72
- How much current is drawn from the source in Figure 13–73 at resonance? What are the inductive current and the capacitive current at the resonant frequency? V₁ = 6.3 V R 20 Ω L 50 mH C 47
- What is the impedance of an ideal parallel resonant circuit (no resistance in either branch)?
- For each following case, express the voltage ratio in decibels: (a) Vin (c) Vin = 1 V, Vout = 1V 10 V, Vout = 7.07 V (b) Vin 5 V, Vout = 3 V (d) Vin=25 V, Vout=5V
- If the lower cutoff frequency is 2400 Hz and the upper cutoff frequency is 2800 Hz, what is the bandwidth?
- In a certain resonant circuit, the power to the load at resonance is 2.75 W. What is the power at the lower and upper cutoff frequencies?
- Find the current through each component in Figure 13–74. Find the voltage across each component. FIGURE 13–74 R₁ 3.3 ΚΩ V = 10 V Χρ 1.0 ΚΩ XLI | 5.0 ΚΩ Χει 10 ΚΩ R₂ 10 ΚΩ
- A parallel resonant band-stop filter is needed to reject 60 Hz power line noise. What size should the inductor be if the capacitor is 200 μF?
- Draw the circuit described in Problem 28 if the output is taken across a 220 Ω resistor.Data in Problem 28A parallel resonant band-stop filter is needed to reject 60 Hz power line noise. What size
- Determine whether there is a value of C that will make Vab = 0 V in Figure 13–75. If not, explain. FIGURE 13-75 V₂ 12 V f = 3 kHz R₁ 180 Ω L₁ 12 mH C L2 8.0 mH
- Design a band-pass filter using a parallel resonant circuit to meet the following specifications: BW 500 Hz, Q = 40, Ic(max) = = 20 mA, VC(max) = 2.5 V.
- If the value of C is 0.22 μF, how much current is through each branch in Figure 13–75? What is the total current? FIGURE 13-75 V₂ 12 V f = 3 kHz 11 ell R₁ 180 Ω L₁ 12 mH lll C L2 8.0 mH
- Design a circuit in which the following series resonant frequencies are switch-selectable: 500 kHz, 1000 kHz, 1500 kHz, 2000 kHz.
- Determine the phase of the secondary voltage with respect to the primary voltage for each transformer in Figure 14–43. (a) lell eee FIGURE 14-43 (b) ell (C)
- What is the turns ratio of a transformer having 120 turns in its primary winding and 360 turns in its secondary winding?
- (a) What is the turns ratio of a transformer having 250 turns in its primary winding and 1000 turns in its secondary winding? (b) What is the turns ratio when the primary winding has 400 turns
- In a silicon crystal, how many covalent bonds does a single atom form?
- What happens when heat is added to silicon?
- Name the two energy levels at which current is produced in silicon.
- Determine the impedance and the phase angle in Figure 10–70. Vs 18 V f=2 kHz FIGURE 10-70 C 0.22 μF R www 750 Ω
- Determine the series element or elements that are in the block of Figure 10–83 to meet the following overall circuit requirements: (a) Ptrue = 400 W (b) Leading power factor (Itot leads
- Determine the value of C2 in Figure 10–84 when VA = VB. V 1 kHz 2.2 ΚΩ R₁ A FIGURE 10-84 www C₁ 0.047μF R₂ www 1.0 ΚΩ C₂ B
- Draw the schematic for the circuit in Figure 10–85 and determine if the waveform on the scope is correct. If there is a fault in the circuit, identify it. Ch 1 1V (a) Oscilloscope display
- Convert the following to millihenries: (a) 1 H (b) 250 μH (c) 10 μH (d) 0.0005 H.
- Convert the following to microhenries: (a) 300 mH (b) 0.08 H (c) 5 mH (d) 0.00045 mH.
- A 12 V battery is connected across a coil with a winding resistance of 120 Ω. How much current is there in the coil?
- How much energy is stored by a 100 mH inductor with a current of 1 A?
- The current through a 100 mH coil is changing at a rate of 200 mA/s. How much voltage is induced across the coil?
- Five inductors are connected in series. The lowest value is 5 μH. If the value of each inductor is twice that of the preceding one, and if the inductors are connected in order of ascending values,
- Determine the total inductance of each circuit in Figure 11–41. (a) 42 m 50 mH L₁ 100 mH FIGURE 11-41 lll L₂ 50 mH (b) lll LI 100 μΗ L2 ,200 H мее L3 400 ΜΗ
- You have a 12 mH inductor, and it is your smallest value. You need an inductance of 8 mH. What value can you use in parallel with the 12 mH to obtain 8 mH?
- Determine the total inductance of each circuit in Figure 11–42. (a) L₁ m 100 ΜΗ L2 m 50 ΜΗ FIGURE 11-42 L3 60 ΜΗ ell L4 | 40 ΜΗ (b) ell L₁ 8 mH L2 4 mH L3 2 mH L4 4 mH
- In the circuit of Figure 11–43, there is initially no current. Determine the inductor voltage at the following times after the switch is closed: (a) 10 μs (b) 20 μs (c) 30
- In Figure 11–44, calculate the current at each of the following times. Assume an ideal inductor and voltage source.(a) 10 μs (b) 20 μs (c) 30 μs. V. 10 V () 10 kHz FIGURE 11-44 R 8.2
- Find the total reactance for each circuit in Figure 11–41 when a voltage with a frequency of 500 kHz is applied across the terminals. (a) 42 m 50 mH Li 100 mH FIGURE 11-41 ell L3 50
- Find the total reactance for each circuit in Figure 11–42 when a 400 kHz signal is applied. (a) L₁ m 100 μΗ L₂ 000 50 ΜΗ FIGURE 11-42 L3 60 μΗ L4 40 ΜΗ (b) L₁ 8 mH L2 4 mH L3 2
- Determine the time constant for the circuit in Figure 11–46. FIGURE 11-46 Vs 15 V Ar R₁ 4.7 ΚΩ R₂ 4.7 ΚΩ Μ L₁ 3.3 mH R₂ 3.3 ΚΩ Μ R4 6.8 ΚΩ
- What is the waveshape of the current in the circuit of Problem 1? Data in Problem 1? An 8 kHz sinusoidal voltage is applied to a series RC circuit. What is the frequency of the voltage
- Find the impedance of each circuit in Figure 10–61.Data in Figure 10–61. 10 V (2) FIGURE 10-61 Xc 100 Ω R 270 Ω www 5 V Ξ Xc 1.0 ΚΩ R Μ 680 Ω
- Determine the impedance and the phase angle in each circuit in Figure 10–62. 50 V (a) R₁ www 100 ΚΩ f= 100 Hz C₁ FIGURE 10-62 C₂ 0.01 μF 0.022 μF R₂ 47 ΚΩ 8 V (b) R www 10 ΚΩ f = 20
- For the circuit of Figure 10–63 , determine the impedance for each of the following frequencies:(a) 100 Hz (b) 500 Hz (c) 1.0 kHz (d) 2.5 kHz V₂ 10 V FIGURE 10-63 R Μ 56
- Calculate the total current in each circuit of Figure 10–61. 10 V (a) FIGURE 10-61 Xc 100 Ω R 270 Ω Μ 5V (b) e Xc 1.0 ΚΩ R 680 Ω
- For the circuit in Figure 10–64, draw the phasor diagram showing all voltages and the total current. Indicate the phase angles. Vs 2 V rms f = 15 kHz FIGURE 10-64 C 0.1 F C 0.22 UF R 100 R 100
- For the circuit in Figure 10–65, determine the following:(a) Z (b) I (c) VR (d) VC. Vs 10 V rms f = 20 Hz FIGURE 10-65 R www 56 Ω C 100 μF
- To what value must the rheostat be set in Figure 10–66 to make the total current 10 mA? What is the resulting phase angle? 10 V 2 10mA f = 10 kHz FIGURE 10-66 C 0.027 μF R
- For the lag circuit in Figure 10–67, determine the phase lag between the input voltage and the output voltage for each of the following frequencies:(a) 1 Hz (b) 100 Hz (c) 1.0
- Determine the impedance for the circuit in Figure 10–69. 10 V FIGURE 10-69 R 1.2 ΚΩ Xc 2.2 ΚΩ
- Determine the impedance and phase angle in Figure 10–71. V₂ 18 V rms f = 2 kHz FIGURE 10-71 C₁ 0.1 μF R₁ www 470 Ω C₂ 0.22 μF R3 ww 680 Ω R₂ 330 Ω
- For the circuit in Figure 10–72, find all the currents and voltages. V₂ 10 V FIGURE 10-72 · Xc 90 Ω Μ R 68 Ω
- For the parallel circuit in Figure 10–73, find each branch current and the total current. What is the phase angle between the source voltage and the total current? 8 V f = 50 kHz FIGURE
- Find the total current for the circuit in Figure 10–75. V₂ 2V f = 100 kHz FIGURE 10-75 Μ R₁ 10 ΚΩ R₂ 12 ΚΩ H C₁ 100 pF C 47 pF
- Is the circuit in Figure 10–76 predominantly resistive or predominantly capacitive? V₂ 12 V f = 15 kHz FIGURE 10-76 C₁ HH 0.1 μF C₂. 0.047μF R₁ 330 Ω C3 0.22 μF R₂ 180 Ω
- Find the current through each branch and the total current in Figure 10–76. 12 V f = 15 kHz FIGURE 10-76 C₁ 0.1 μF C₂ 0.047μF +₁₁ R₁ 330 Ω C3 0.22 μF R₂ 180 Ω
- For the circuit in Figure 10–77, determine the following:(a) Itot (b) θ (c) VRI (d) VR2 (e) VR3 (f) Vc V₂ 15 V f = 1 kHz C 0.47μF FIGURE 10-77 R₁ www 47
- In Figure 10–65, what is the true power and the reactive power? Vs 10 V rms f = 20 Hz FIGURE 10-65 R www 56 Ω +₁₁ C 100 μF
- What is the power factor for the circuit of Figure 10–75? Vs 2 V f = 100 kHz FIGURE 10-75 R₁ 10 ΚΩ R₂ 12 ΚΩ C₁ 100 pF C₂ 47 pF
- Determine the bandwidth of the circuit in Figure 10–68. Vin 10 V FIGURE 10-68 C 0.1 MF H11 R 1.0 ΚΩ
- Each of the capacitors in Figure 10–80 has developed a leakage resistance of 2 kΩ. Determine the output voltages under this condition for each circuit. 1V f = 10 Hz (a) R₁ Μ 10 ΚΩ FIGURE
- Determine the value of R1 required to get a phase angle of 30° between the source voltage and the total current in Figure 10–82. V₂ 10 V f = 1 kHz FIGURE 10-82 www R₁ www R₂ 47 ΚΩ C 0.01
- A certain load dissipates 1.5 kW of power with an impedance of 12 Ω and a power factor of 0.75. What is its reactive power? What is its apparent power?
- What is the voltage across the inductor in Figure 11–44 at each of the following times? (a) 60 μs (b) 70 μs (c) 80 μs 10 V 10 kHz FIGURE 11-44 R www 8.2 ΚΩ ell L 75 mH V₂ 10
- What is the voltage across the resistor in Figure 11–44 at a time of 60 μs? V₂ 10 V ( 10 kHz FIGURE 11-44 R www 8.2 ΚΩ L 75 mH Vs 10 V OV 0 50 100 t(us)
- Find the impedance of each circuit in Figure 12–45. V₂ 10 V (a) XL 500 Ω FIGURE 12-45 R 1.0 ΚΩ Vs 5V (b) XL 1.0 ΚΩ R 1.5 ΚΩ
- Determine the impedance and phase angle for the circuit in Figure 12–46. 8 V R 470 02 f=20 kHz FIGURE 12-46 lll lll L₁ 5.0 mHe L2 8.0 mH
- In Figure 12–47, determine the impedance at each of the following frequencies:(a) 100 Hz (b) 500 Hz (c) 1 kHz (d) 2 kHz V₂ R www 12 Ω FIGURE 12-47 L m 20 mH
- Assume that the inductance in Figure 12–45 (a) is 796 μH. What is the source frequency? V₂ 10 V (a) XL 500 Ω FIGURE 12-45 +₁₁ R 1.0 ΚΩ
- Determine the voltage across the total resistance and across the total inductance in Figure 12–46. V₂ 8 V R 470 02 f=20 kHz FIGURE 12-46 lll lll L1 5.0 mH L2 8.0 mH
- Find the current for each circuit of Figure 12–45. V₂ 10 V (a) Ο XL 000 500 Ω FIGURE 12-45 R 1.0 ΚΩ V₂ 5V (b) XL 80 Μ 1.0 ΚΩ R 1.5 ΚΩ
- Calculate the total current for the circuit of Figure 12–46. V₂. 8 V R 470 Ω f=20 kHz FIGURE 12-46 lll L₁ 5.0 mHe L2 8.0 mH