EBK ELECTRIC CIRCUITS
11th Edition
ISBN: 8220106795262
Author: Riedel
Publisher: YUZU
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Chapter 18, Problem 19P
To determine
Calculate the s-domain expression for the z parameters of the two port circuit shown in the given circuit.
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A three-phase, 400 V, star-connected motor has an
output of 50 kW, with an efficiency of 90 per cent and
a power factor of 0.85. Calculate the line current.
Sketch a phasor diagram showing the voltages and
currents. If the motor windings were connected in
mesh, what would be the correct voltage of a three
phase supply suitable for the motor? ANS:
90.8 A, 240 V
Don't use ai to answer I will report you answer
Chapter 18 Solutions
EBK ELECTRIC CIRCUITS
Ch. 18.2 - Find the y parameters for the circuit in Fig....Ch. 18.2 - Prob. 2APCh. 18.2 - Prob. 3APCh. 18.2 - Prob. 4APCh. 18.2 - Prob. 5APCh. 18.3 - Prob. 6APCh. 18.4 - Each element in the symmetric bridged-tee circuit...Ch. 18 - Prob. 1PCh. 18 - Prob. 2PCh. 18 - Prob. 3P
Ch. 18 - Find the b parameters for the circuit shown in...Ch. 18 - Find the y parameters for the circuit shown in...Ch. 18 - Prob. 6PCh. 18 - Prob. 7PCh. 18 - Prob. 8PCh. 18 - Find the g parameters for the operational...Ch. 18 - Find the a parameters for the circuit in Fig....Ch. 18 - Use the results obtained in Problem 18.10 to...Ch. 18 - Prob. 12PCh. 18 - Prob. 15PCh. 18 - Prob. 16PCh. 18 - Prob. 17PCh. 18 - Prob. 18PCh. 18 - Prob. 19PCh. 18 - Use the defining equations to find the s-domain...Ch. 18 - Prob. 21PCh. 18 - Prob. 22PCh. 18 - Prob. 23PCh. 18 - Prob. 24PCh. 18 - Prob. 25PCh. 18 - Prob. 26PCh. 18 - Find the Thevenin equivalent circuit with respect...Ch. 18 - Prob. 28PCh. 18 - Prob. 30PCh. 18 - The h parameters for the two-port amplifier...Ch. 18 - For the terminated two-port amplifier circuit in...Ch. 18 - Prob. 33PCh. 18 - The linear transformer in the circuit shown in...Ch. 18 - The following measurements were made on a...Ch. 18 - Find the z parameters for the two-port network in...Ch. 18 - Find the s-domain expressions for the h parameters...Ch. 18 - The g and h parameters for the resistive two-ports...Ch. 18 - The h parameters of the first two-port circuit in...Ch. 18 - The networks A and B in the circuit in Fig. P18.40...Ch. 18 - Prob. 41PCh. 18 -
Show that the circuit in Fig. P18.42 is an...Ch. 18 - Prob. 43PCh. 18 - Prob. 44PCh. 18 - Prob. 45P
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- Derive the numerical relationship between the line and phase currents for a balanced three-phase delta connected load. Three coils are connected in delta to a three-phase, three-wire, 400 V, 50 Hz supply and take a line current of 5 A 0.8 power factor lagging. Calculate the resistance and inductance of the coils. If the coils are star-connected to the same supply, calculate the line current and the total power. Calculate the line cur rents if one coil becomes open-circuited when the coils are connected in star. Ans: 110.7 Ω, 0.264 H; 1.67 A, 926 W; 1.445 A, 1.445 A, 0arrow_forwardDerive, for both star- and delta-connected systems, an expression for the total power input for a balanced three-phase load in terms of line voltage, line current and power factor. The star-connected secondary of a transformer supplies a delta-connected motor taking a power of 90 kW at a lagging power factor of 0.9. If the volt age between lines is 600 V, calculate the current in the transformer winding and in the motor winding. Draw circuit and phasor diagrams, properly labelled, showing all voltages and currents in the transformer secondary and the motor. ANS: . 96.2 A, 55.6 Aarrow_forwardDeduce the relationship between the phase and the line voltages of a three-phase star-connected generator. If the phase voltage of a three-phase star-connected generator is 200 V, what will be the line voltages: (a) when the phases are correctly connected; (b) when the connections to one of the phases are reversed? ans: 346 V; 346 V, 200 V, 200 Varrow_forward
- Q2: Given a discrete sequence x(n) = [1,-1,2,4, 1, 3,-1,1] and its spectrum X(k): i. Show that: X(k) =G(k)+WH(k) k=0,1,2,3,4,5,6,7 where G(k) = DFT[g(n)] and H(k) = DFT[h(n)], g(n) and h(n) are even and odd components of x(n) respectively. ii. Compute G(k) and H(k) using the method of computation of DFTS of two real sequences. (15 marks)arrow_forwardQ2: Given a discrete sequence x(n) = [1,-1,2,4, 1, 3,-1,1] and its spectrum X(k): i. Show that: X(k) = G(k)+WH(k) k = 0,1,2,3,4,5,6,7 where G(k) = DFT[g(n)] and H(k) = DFT[h(n)], g(n) and h(n) are even and odd components of x(n) respectively. ii. Compute G(k) and H(k) using the method of computation of DFTS of two real sequences.arrow_forwardQ1 .For the unity feedback control system shown below, discuss the stability using Bode Plotarrow_forward
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