Problem 1RQ: Which of the following is not a right way to express the sinusoid A cos t? (a) A cos 2 ft (b) A... Problem 2RQ: A function that repeats itself after fixed intervals is said to be: (a)a phasor (b)harmonic... Problem 3RQ: Which of these frequencies has the shorter period? (a)1 krad/s (b)1 kHz Problem 4RQ: If v1 = 30 sin(t + 10) and v2 = 20 sin(t + 50), which of these statements are true? (a) v1 leads v2... Problem 5RQ: The voltage across an inductor leads the current through it by 90. (a)True (b)False Problem 6RQ: The imaginary part of impedance is called: (a)resistance (b)admittance (c)susceptance (d)conductance... Problem 7RQ: The impedance of a capacitor increases with increasing frequency. (a) True (b) False Problem 8RQ: At what frequency will the output voltage v0(t) in Fig. 9.39 be equal to the input voltage v(t) ?... Problem 9RQ: A series RC circuit has VR = 12 V and VC = 5 V. The magnitude of the supply voltage is: (a)7 V (b)7... Problem 10RQ: A series RCL circuit has R = 30 , XC = 50 , and XL = 90 . The impedance of the circuit is: (a)30 +... Problem 1P: Given the sinusoidal voltage v(t) = 50 cos (30t + 10) V, find: (a) the amplitude Vm, (b) the period... Problem 2P: A current source in a linear circuit has is=15cos(25t+25)A (a) What is the amplitude of the current?... Problem 3P: Express the following functions in cosine form: (a) 10 sin(t + 30) (b) 9 sin (8t) (c) 20 sin(t + 45) Problem 4P: Design a problem to help other students better understand sinusoids. Problem 5P: Given v1=45sint+30V and v2=50cost30V, determine the phase angle between the two sinusoids and which... Problem 6P: For the following pairs of sinusoids, determine which one leads and by how much. (a)... Problem 7P: If f() = cos + j sin , show that f() = ej. Problem 8P: Calculate these complex numbers and express your results in rectangular form: (a) 60457.5j10+j2 (b)... Problem 9P: Evaluate the following complex numbers and leave your results in polar form: (a) 5306j8+3602+j (b)... Problem 10P: Design a problem to help other students better understand phasors. Problem 11P: Find the phasors corresponding to the following signals: (a) v(t) = 21 cos(4t 15)V (b) i(t) = 8... Problem 12P: Let X=440 and Y=2030. Evaluate the following quantities and express your results in polar form: (a)... Problem 13P: Evaluate the following complex numbers: (a) 2+j31j6+7j85+j11 (b) 5101040480650 (c) 2+j3j2j28j5 Problem 14P: Simplify the following expression: (a) 5j62+j83+j45j+4j6 (b) 24075+1603060j8067+j842032 (c)... Problem 15P: Evaluate these determinants: (a) 10+j62j351+j (b) 2030410160340 (c) 1jj0j1j1j1+j Problem 16P Problem 17P: Two voltages v1 and v2 appear in series so that their sum is v=v1+v2. If v1=10cos50t/3V and... Problem 18P: Obtain the sinusoids corresponding to each of the following phasors: (a) V2=6+j8V,=40 (b)... Problem 19P: Using phasors, find: (a) 3cos20t+105cos20t30 (b) 40sin50t+30cos50t45 (c)... Problem 20P: A linear network has a current input 7.5cos10t+30A and a voltage output 120cos10t+75V. Determine the... Problem 21P: Simplify the following: (a) ft=5cos2t+154sin2t30 (b) gt=8sint+4cost+50 (c) ht=0t10cos40t+50sin40tdt Problem 22P: An alternating voltage is given by v(t) = 55 cos(5t + 45) V. Use phasors to find... Problem 23P: Apply phasor analysis to evaluate the following: (a) v = [110 sin(20t + 30) + 220 cos(20t 90)] V... Problem 24P: Find v(t) in the following integrodifferential equations using the phasor approach: (a)... Problem 25P: Using phasors, determine i(t) in the following equations: (a) 2didt+3i(t)=4cos(2t45) (b)... Problem 26P Problem 27P: A parallel RLC circuit has the node equation dvdt+50v+100vdt=110cos(377t10)V Determine v(t) using... Problem 28P: Determine the current that flows through an 20- resistor connected to a voltage source... Problem 29P: Given that vc(0) = 2 cos(155) V, what is the instantaneous voltage across a 2-F capacitor when the... Problem 30P: A voltage v(t) = 100 cos(60t + 20) V is applied to a parallel combination of a 40-k resistor and a... Problem 31P: A series RLC circuit has R = 80 , L = 240 mH, and C = 5 mF. If the input voltage is v(t) = 115 cos... Problem 32P: Using Fig. 9.40, design a problem to help other students better understand phasor relationships for... Problem 33P: A series RL circuit is connected to a 220-V ac source. If the voltage across the resistor is 170 V,... Problem 34P: What value of will cause the forced response, vo in Fig. 9.41 to be zero? Figure 9.41 Problem 35P: Find the steady-state current i in the circuit of Fig. 9.42, when vs(t) = 115 cos 200t V. Figure... Problem 36P: Using Fig. 9.43, design a problem to help other students better understand impedance. Figure 9.43 Problem 37P: Determine the admittance Y for the circuit in Fig. 9.44. Problem 38P: Using Fig. 9.45, design a problem to help other students better understand admittance. Figure 9.45 Problem 39P: For the circuit shown in Fig. 9.46, find Zeq and use that to find current I. Let = 10 rad/s. Figure... Problem 40P: In the circuit of Fig. 9.47, find io when: (a) = 1 rad/s (b) = 5 rad/s (c) = 10 rad/s Figure 9.47 Problem 41P: Find v(t) in the RLC circuit of Fig. 9.48. Figure 9.48 Problem 42P: Calculate vo(t) in the circuit of Fig. 9.49. Figure 9.49 Problem 43P: Find current Io in the circuit shown in Fig. 9.50. Figure 9.50 Problem 44P: Calculate i(t) in the circuit of Fig. 9.51. Figure 9.51 Problem 45P: Find current Io in the network of Fig. 9.52. Figure 9.52 For Prob. 9.45. Problem 46P: If vs = 100 sin(10t + 18) V in the circuit of Fig. 9.53, find io. Figure 9.53 For Prob. 9.46. Problem 47P: In the circuit of Fig. 9.54, determine the value of is(t). Figure 9.54 Problem 48P: Given that vs(t) = 20 sin (100t 40) in Fig. 9.55, determine ix (t). Problem 49P: Find vs (t) in the circuit of Fig. 9.56 if the current ix through the 1- resistor is 8 sin 200t A.... Problem 50P: Determine vx in the circuit of Fig. 9.57. Let is(t) = 5 cos(100t + 40) A. Figure 9.57 Problem 51P: If the voltage vo across the 2- resistor in the circuit of Fig. 9.58 is 90 cos 2t V, obtain is.... Problem 52P: If V in the circuit of Fig. 9.59, find Is. Figure 9.59 Problem 53P: Find Io in the circuit of Fig. 9.60. Problem 54P: In the circuit of Fig. 9.61, Find Vs if Io=300A. Problem 55P: Find Z in the network of Fig. 9.62, given that Figure 9.62 Problem 56P: At = 377 rad/s, find the input impedance of the circuit shown in Fig. 9.63. Figure 9.63 Problem 57P: At = 1 rad/s, obtain the input admittance in the circuit of Fig. 9.64. Figure 9.64 Problem 58P: Using Fig. 9.65, design a problem to help other students better understand impedance combinations.... Problem 59P: For the network in Fig. 9.66, find Zin. Let = 100 rad/s. Figure 9.66 Problem 60P: Obtain Zin for the circuit in Fig. 9.67. Figure 9.67 Problem 61P: Find Zeq in the circuit in Fig. 9.68. Figure 9.68 Problem 62P: For the circuit in Fig. 9.69, find the input impedance Zin at 10 krad/s. Figure 9.69 Problem 63P: For the circuit in Fig. 9.70, find the value of ZT. Figure 9.70 For Prob. 9.63. Problem 64P: Find ZT and Vo in the circuit in Fig. 9.71. Let the value of the inductance equal j20 . Figure 9.71 Problem 65P: Determine ZT and I for the circuit in Fig. 9.72. Figure 9.72 Problem 66P: For the circuit in Fig. 9.73, calculate ZT and Vab. Figure 9.73 Problem 67P: At = 103 rad/s, find the input admittance of each of the circuits in Fig. 9.74. Figure 9.74 Problem 68P: Determine Yeq for the circuit in Fig. 9.75. Figure 9.75 Problem 69P: Find the equivalent admittance Yeq of the circuit in Fig. 9.76. Figure 9.76 Problem 70P: Find the equivalent impedance of the circuit in Fig. 9.77. Figure 9.77 For Prob. 9.70. Problem 71P: Obtain the equivalent impedance of the circuit in Fig. 9.78. Figure 9.78 For Prob. 9.71. Problem 72P: Calculate the value of Zab in the network of Fig. 9.79. Figure 9.79 For Prob. 9.72. Problem 73P: Determine the equivalent impedance of the circuit in Fig. 9.80. Figure 9.80 For Prob. 9.73. Problem 74P: Design an RL circuit to provide a 90 leading phase shift. Problem 75P: Design a circuit that will transform a sinusoidal voltage input to a cosinusoidal voltage output. Problem 76P: For the following pairs of signals, determine if v1 leads or lags v2 and by how much. (a) v1 = 10... Problem 77P: Refer to the RC circuit in Fig. 9.81. (a) Calculate the phase shift at 2 MHz. (b) Find the frequency... Problem 78P: A coil with impedance 8 + j6 is connected in series with a capacitive reactance X. The series... Problem 79P: (a) Calculate the phase shift of the circuit in Fig. 9.82. (b) State whether the phase shift is... Problem 80P: Consider the phase-shifting circuit in Fig. 9.83. Let Vi = 120 V operating at 60 Hz. Find: (a) Vo... Problem 81P: The ac bridge in Fig. 9.37 is balanced when R1 = 400 , R2 = 600 , R3 = 1.2 k, and C2 = 0.3 F. Find... Problem 82P: A capacitance bridge balances when R1 = 100 , R2 = 2 k, and Cs = 40 F. What is Cx, the capacitance... Problem 83P: An inductive bridge balances when R1 = 1.2 k, R2 = 500 , and Ls = 250 mH. What is the value of Lx,... Problem 84P: The ac bridge shown in Fig. 9.84 is known as a Maxwell bridge and is used for accurate measurement... Problem 85P: The ac bridge circuit of Fig. 9.85 is called a Wien bridge. It is used for measuring the frequency... Problem 86CP: The circuit shown in Fig. 9.86 is used in a television receiver. What is the total impedance of this... Problem 87CP: The network in Fig. 9.87 is part of the schematic describing an industrial electronic sensing... Problem 88CP: A series audio circuit is shown in Fig. 9.88. (a) What is the impedance of the circuit? (b) If the... Problem 89CP: An industrial load is modeled as a series combination of an inductor and a resistance as shown in... Problem 90CP: An industrial coil is modeled as a series combination of an inductance L and resistance R, as shown... Problem 91CP: Figure 9.91 shows a series combination of an inductance and a resistance. If it is desired to... Problem 92CP: A transmission line has a series impedance of and a shunt admittance of . Find: (a) the... Problem 93CP: A power transmission system is modeled as shown in Fig. 9.92. Given the source voltage and circuit... format_list_bulleted