EBK INTRODUCTORY CIRCUIT ANALYSIS
EBK INTRODUCTORY CIRCUIT ANALYSIS
13th Edition
ISBN: 8220100668234
Author: Boylestad
Publisher: PEARSON
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Chapter 20, Problem 24P

a. The inductance of an air-core coil is 0.08 H. and the effective resistance is 4 Ω when a 60 V. 50 Hz source is connected across the coil. Find the current passing through the coil and the reading of a wattmeter across the coil.

b. If a brass core is inserted in the coil, the effective resistance increases to 7 Ω and the wattmeter reads 30 W. Find the current passing through the coil and the inductance of the coil.

c. If a solid iron core is inserted in the coil, the effective resistance of the coil increases to 1.7 A. and the current decreases to 1.7 A. Find the wattmeter reading and the inductance of the coil.

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For the circuit shown,a) To the coil of a henry, measure its internal resistance and the value of the inductance.b) Measure the effective voltage and current at the terminals of the 100 Ω resistor and at the source.c) Measure the average power delivered by the source.Note the phase shift between the supply voltage and the voltage across the 100 Ω resistor (only at this point).
A series circuit containing a noninductive resistance of 3 Ω and a coil is connected to a 120 V, 60 Hz supply. The current is 25 A. The true power, as indicated by a wattmeter, is 2500 W. Determine: the power factor of the series circuit. the effective resistance of the coil. the impedance and inductive rea ctance for the coil. the power factor of the coil
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EBK INTRODUCTORY CIRCUIT ANALYSIS

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