Introductory Circuit Analysis; Laboratory Manual For Introductory Circuit Analysis Format: Kit/package/shrinkwrap
13th Edition
ISBN: 9780134297446
Author: Boylestad, Robert L.
Publisher: Prentice Hall
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Textbook Question
Chapter 18, Problem 49P
Determine the nodal voltages for the network of Fig. 18.86.
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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 18 Solutions
Introductory Circuit Analysis; Laboratory Manual For Introductory Circuit Analysis Format: Kit/package/shrinkwrap
Ch. 18 - Discuss, in your own words, the difference between...Ch. 18 - Convert the voltage source in Fig. 18.62 to a...Ch. 18 - Convert the current source in Fig. 18.63 to a...Ch. 18 - Convert the votage source in Fig. 18.64(a) to a...Ch. 18 - Write the mesh equations for the network of Fig....Ch. 18 - Write the mesh equations for the network of Fig....Ch. 18 - Write the mesh equations for the network of Fig....Ch. 18 - Write the mesh equations for the network of Fig....Ch. 18 - Write the mesh equations for the network of Fig....Ch. 18 - Write the mesh equtions for the network of Fig....
Ch. 18 - Write the mesh equations for the network of Fig....Ch. 18 - Using mesh analysis, determine the current IL (in...Ch. 18 - Using mesh analysis, determine the current IL (in...Ch. 18 - Write the mesh equations for the network of Fig....Ch. 18 - Write the mesh equations for the network of...Ch. 18 - Write the mesh equations for the network of Fig....Ch. 18 - Determine the nodal voltages for the network of...Ch. 18 - Determine the nodal voltages for the network of...Ch. 18 - Determine the nodal voltages for the network of...Ch. 18 - Determine the nodal voltages for the network of...Ch. 18 - Determine the nodal voltages for the network of...Ch. 18 - Determine the nodal voltages for the network of...Ch. 18 - Determine the nodal votas for the network of Fig....Ch. 18 - Determine the nodal voltages for the network of...Ch. 18 - Write the nodal equations for the network in Fig....Ch. 18 - Write the nodal equations for the network of Fig....Ch. 18 - Write the nodal equations for the network of Fig....Ch. 18 - Write the nodal equations for the network of Fig....Ch. 18 - For the network of Fig. 18.87, determine the...Ch. 18 - For the bridge network in Fig. 18.88: Fig. 18.88...Ch. 18 - For the bridge network in Fig. 18.89: a. Is the...Ch. 18 - The Hay bridge in Fig. 18.90 is balanced. Using...Ch. 18 - Determine whether the Maxwell bridge in Fig. 18.91...Ch. 18 - Derive the balance equations (18.16) and (18.17)...Ch. 18 - Determine the balance equations for the inductance...Ch. 18 - Using the -YorY-conversion, determine the current...Ch. 18 - Using the -YorY-conversion, determine the current...Ch. 18 - Using the -YorY-conversion, determine the current...Ch. 18 - Using the -YorY-conversion, determine the current...Ch. 18 - Determine the mesh currents for the network of...Ch. 18 - Prob. 41PCh. 18 - Prob. 42PCh. 18 - Prob. 43PCh. 18 - Prob. 44PCh. 18 - Determine the nodal voltages for the network of...Ch. 18 - Determine the nodal voltages for the network of...Ch. 18 - Prob. 47PCh. 18 - Determine the nodal voltages for the network of...Ch. 18 - Determine the nodal voltages for the network of...
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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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