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4. A circuit has impedance of 3.464+j2.0 ohm is supplied from a source voltage of 240 volts, 60 Hz. What is the current when resistance is reduced by 50%? A. 91 A B. 60A С. 72 A D. 54A 5. A resistance of 30 ohms and an inductive reactance of 60 ohms are in series across 120 volts, 60 cycles source. Find the power factor in percent of the circuit? A. 45 В. 67 6. A series RLC circuit is excited by a 100 volts 79.6 Hz source. Resistance R is 100 ohms, inductance L is 1 H and capacitance C is 5 micro farad. Calculate the voltage across C. С. 87 D. 75 A. 353.5/45° C. 70.7/-45° B. 332.6/35° D. 282.8/-135°

4. A circuit has impedance of 3.464+j2.0 ohm is supplied from a source voltage of 240 volts, 60 Hz. What is the current when resistance is reduced by 50%? A. 91 A B. 60A С. 72 A D. 54A 5. A resistance of 30 ohms and an inductive reactance of 60 ohms are in series across 120 volts, 60 cycles source. Find the power factor in percent of the circuit? A. 45 В. 67 6. A series RLC circuit is excited by a 100 volts 79.6 Hz source. Resistance R is 100 ohms, inductance L is 1 H and capacitance C is 5 micro farad. Calculate the voltage across C. С. 87 D. 75 A. 353.5/45° C. 70.7/-45° B. 332.6/35° D. 282.8/-135°

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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1. Find the equivalent impedance of the given circuit. Use 2kHz as frequency. 50 2 10 mH 100 2 2 µF 80 2 2. The instantaneous voltage and current equations of an ac circuit are v(t)= 200 sin377t V and i(t)= 8 sin (377t-30°) A respectively. Determine the apparent power in complex form. A. 296.8+j400 B. 962.8+j400 C. 692.8+j400 D.692.8+j200 3. Two impedances, Z1 = 0.8 + j5.6 and Zz = 8-j16 and a single-phase motor are connected in parallel across 200 Vrms, 60HZ supply. The motor draws 5 kVA at 80% power factor lagging. Find the total complex power. A. 4-j3 kVÁ B.7+j5 kVA 4. A circuit has impedance of 3.464+j2.0 ohm is supplied from a source voltage of 240 volts, 60 Hz. What is the current when resistance is reduced by 50%? C. 6 + j2 kVA D. 1+ j7 kVA C. 72 A D. 54A A. 91 A В. 6ОА 5. A resistance of 30 ohms and an inductive reactance of 60 ohms are in series across 120 volts, 60 cycles source. Find the power factor in percent of the circuit? С. 87 D. 75 A. 45 В. 67 6. A series RLC circuit is excited by a 100 volts 79.6 Hz source. Resistance R is 100 ohms, inductance L is 1 H and capacitance C is 5 micro farad. Calculate the voltage across C. A. 353.5/45° C. 70.7/-45° В. 332.6/35° D. 282.8/-135° ww
Transcribed Image Text:1. Find the equivalent impedance of the given circuit. Use 2kHz as frequency. 50 2 10 mH 100 2 2 µF 80 2 2. The instantaneous voltage and current equations of an ac circuit are v(t)= 200 sin377t V and i(t)= 8 sin (377t-30°) A respectively. Determine the apparent power in complex form. A. 296.8+j400 B. 962.8+j400 C. 692.8+j400 D.692.8+j200 3. Two impedances, Z1 = 0.8 + j5.6 and Zz = 8-j16 and a single-phase motor are connected in parallel across 200 Vrms, 60HZ supply. The motor draws 5 kVA at 80% power factor lagging. Find the total complex power. A. 4-j3 kVÁ B.7+j5 kVA 4. A circuit has impedance of 3.464+j2.0 ohm is supplied from a source voltage of 240 volts, 60 Hz. What is the current when resistance is reduced by 50%? C. 6 + j2 kVA D. 1+ j7 kVA C. 72 A D. 54A A. 91 A В. 6ОА 5. A resistance of 30 ohms and an inductive reactance of 60 ohms are in series across 120 volts, 60 cycles source. Find the power factor in percent of the circuit? С. 87 D. 75 A. 45 В. 67 6. A series RLC circuit is excited by a 100 volts 79.6 Hz source. Resistance R is 100 ohms, inductance L is 1 H and capacitance C is 5 micro farad. Calculate the voltage across C. A. 353.5/45° C. 70.7/-45° В. 332.6/35° D. 282.8/-135° ww
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