Introductory Circuit Analysis
13th Edition
ISBN: 9780133923919
Author: Boylestad, Robert L.
Publisher: Pearson Education
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Chapter 11, Problem 33P
The network in Fig. 11.98 employs a DMM with an internal resistance of 10 M
a. Find the voltage across the coil the instant after the switch is closed.
b. What is the final value of the current iL?
c. How much time must pass before L reaches 10
d. What is the voltmeter reading at
Fig. 11.98
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Problem 11.34. At full load, a commercially available 106 hp, three-phase induction motor operates at an efficiency of 96% and a power factor of 0.87 lag. The motor is supplied from a three-phase outlet with a line-voltage rating of 208 V.
1. What is the magnitude of the line current in Ampere drawn from the 208 V outlet? (1 hp = 746 W).
2. Calculate the reactive power in kVAR supplied to the motor.
Q1) What is the apparent power given by a source that, in a circuit, feeds 525 V at 50 Hz to a resistor of value 3.1 ohms and a capacitor of reactance 1.6 ohms? Provide a response in kVA.
A 3-phase, 50 Hz, 3000 V motor develops 600 H.P. (447·6 kW), the power factor being 0·75 lagging and the efficiency 0·93. A bank of capacitors is connected in delta across the supply terminals and power factor raised to 0·9 lagging. Each of the capacitance units is built of five similar 600-V capacitors. Determine the leading Kvar taken by each three sets.
Chapter 11 Solutions
Introductory Circuit Analysis
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