Loose Leaf for Engineering Circuit Analysis Format: Loose-leaf
9th Edition
ISBN: 9781259989452
Author: Hayt
Publisher: Mcgraw Hill Publishers
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Chapter 16, Problem 32E
To determine
The conversion of
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Find Laplace transform and the corresponding ROC for
x(t) = e−3sin(2t) u(t)dt
Three similar coils, connected in star, take a total
power of 1.5 kW, at a power factor of 0.2, from a
three-phase, 400 V, 50 Hz supply. Calculate: (a) the
resistance and inductance of each coil; (b) the line
currents if one of the coils is short-circuited.
(a) Three 20 µF capacitors are star-connected across
a 400 V, 50 Hz, three-phase, three-wire supply.
Calculate the current in each line. (b) If one of the
capacitors is short-circuited, calculate the line cur
rents. (c) If one of the capacitors is open-circuited,
calculate: the line currents and the p.d. across each
of the other two capacitors.
ANS:
1.525 A; 2.64 A, 2.64 A, 4.57 A; 1.32 A, 1.32 A, 0;
210 V
Chapter 16 Solutions
Loose Leaf for Engineering Circuit Analysis Format: Loose-leaf
Ch. 16.1 - Find the input impedance of the network shown in...Ch. 16.1 - Write a set of nodal equations for the circuit of...Ch. 16.2 - By applying the appropriate 1 V sources and short...Ch. 16.2 - Prob. 4PCh. 16.2 - Prob. 5PCh. 16.3 - Prob. 6PCh. 16.3 - Use Y and Y transformations to determine Rin for...Ch. 16.4 - Find z for the two-port shown in (a) Fig. 16.23a;...Ch. 16.4 - Prob. 9PCh. 16.5 - Prob. 10P
Ch. 16.5 - Prob. 11PCh. 16.6 - Prob. 12PCh. 16 - For the following system of equations, (a) write...Ch. 16 - With regard to the passive network depicted in...Ch. 16 - Determine the input impedance of the network shown...Ch. 16 - For the one-port network represented schematically...Ch. 16 - Prob. 6ECh. 16 - Prob. 7ECh. 16 - Prob. 8ECh. 16 - Prob. 9ECh. 16 - (a) If both the op amps shown in the circuit of...Ch. 16 - Prob. 11ECh. 16 - Prob. 12ECh. 16 - Prob. 13ECh. 16 - Prob. 14ECh. 16 - Prob. 15ECh. 16 - Prob. 16ECh. 16 - Prob. 17ECh. 16 - Prob. 18ECh. 16 - Prob. 19ECh. 16 - Prob. 20ECh. 16 - For the two-port displayed in Fig. 16.49, (a)...Ch. 16 - Prob. 22ECh. 16 - Determine the input impedance Zin of the one-port...Ch. 16 - Determine the input impedance Zin of the one-port...Ch. 16 - Employ Y conversion techniques as appropriate to...Ch. 16 - Prob. 26ECh. 16 - Prob. 27ECh. 16 - Prob. 28ECh. 16 - Compute the three parameter values necessary to...Ch. 16 - It is possible to construct an alternative...Ch. 16 - Prob. 31ECh. 16 - Prob. 32ECh. 16 - Prob. 33ECh. 16 - Prob. 34ECh. 16 - The two-port networks of Fig. 16.50 are connected...Ch. 16 - Prob. 36ECh. 16 - Prob. 37ECh. 16 - Obtain both the impedance and admittance...Ch. 16 - Prob. 39ECh. 16 - Determine the h parameters which describe the...Ch. 16 - Prob. 41ECh. 16 - Prob. 42ECh. 16 - Prob. 43ECh. 16 - Prob. 44ECh. 16 - Prob. 45ECh. 16 - Prob. 46ECh. 16 - Prob. 47ECh. 16 - Prob. 48ECh. 16 - Prob. 49ECh. 16 - Prob. 50ECh. 16 - (a) Employ suitably written mesh equations to...Ch. 16 - Prob. 52ECh. 16 - Prob. 53ECh. 16 - The two-port of Fig. 16.65 can be viewed as three...Ch. 16 - Consider the two separate two-ports of Fig. 16.61....Ch. 16 - Prob. 56ECh. 16 - Prob. 57ECh. 16 - Prob. 58ECh. 16 - (a) Obtain y, z, h, and t parameters for the...Ch. 16 - Four networks, each identical to the one depicted...Ch. 16 - A cascaded 12-element network is formed using four...Ch. 16 - Prob. 62ECh. 16 - Continuing from Exercise 62, the behavior of a ray...
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- Explain the advantages of three-phase supply for distribution purposes. (b) Assuming the relationship between the line and phase values of currents and voltages, show that the active power input to a three-phase balanced load is √3VI cos φ, where V and I are line quantities. (c) Three similar inductors, each of resistance 10 Ω and inductance 0.019 H, are delta-connected to a three-phase, 400 V, 50 Hz sinusoidal supply. Calcu late: the value of the line current; the power factor and the active power input to the circuit. ANS: 59.5 A, 0.858 lag, 35.5 kWarrow_forwardnot use ai pleasearrow_forwardA 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 Varrow_forward
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- A three-phase delta-connected load, each phase of which has an inductive reactance of 40 Ω and a resistance of 25 Ω, is fed from the secondary of a three-phase star-connected transformer which has a phase voltage of 230 V. Draw the circuit diagram of the system and calculate: (a) the current in each phase of the load; (b) the p.d. across each phase of the load; (c) the current in the transformer secondary windings; the total active power taken from the supply and its power factor.arrow_forwardDerive 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_forward
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