7. A source of 100 Volts rms is supplying a resistance 80 ohms in parallel with a 200mHinductor. To what angle is the current lag or lead?A. 46.7 deg. lagB. 43.3 deg. lagC. 46.7 deg. leadD. 43.3 deg. Lead8. Two impedances Zı=2+j4 and Z2=R+j0, are connected in parallel. Determine R so that the pfof the circuit is 0.9 lagging.A. 3.2 ohmsB. 4.2 ohmsC. 2.4 ohmsD. 6.4 ohms9. The power factor of a load on a 120 volt. 60HZ source is raised from 0.707 to 0.866 laggingby connecting a 53 micro-farad capacitor across the load. What is the true power of the load inwatts?C. 862D. 268А. 286В. 68210. A factory has an average demand of 176 kw at 70% power factor. What is the minimum sizeof capacitor required to raise the power factor to 95%?C. 122 KVARD. 157 KVARA. 165 KVARB. 82 KVAR

According to guidelines we need to solve only the first question. According to the question we have…

7. A source of 100 Volts rms is supplying a resistance 80 ohms in parallel with a 200mH inductor. To what angle is the current lag or lead? A. 46.7 deg. lag B. 43.3 deg. lag C. 46.7 deg. lead D. 43.3 deg. Lead

7. A source of 100 Volts rms is supplying a resistance 80 ohms in parallel with a 200mH inductor. To what angle is the current lag or lead? A. 46.7 deg. lag B. 43.3 deg. lag C. 46.7 deg. lead D. 43.3 deg. Lead

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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Concept explainers

Sinusoids And Phasors

Sinusoids are defined as the mathematical waveforms that are used to describe the nature of periodic oscillations.

Circuit Theory

Electric circuits are a network that comprises of a closed-loop, which helps in providing a return path for the current through a switch. When the switch is activated, the load operates, and the current accepts a path to finish the circuit at a low potential level from the opposing high potential level. Electric circuits theory is a linear analysis that helps in establishing a linear relation of voltage and current for R (resistance), L (inductance), and C (capacitance).

Question

7. A source of 100 Volts rms is supplying a resistance 80 ohms in parallel with a 200mH
inductor. To what angle is the current lag or lead?
A. 46.7 deg. lag
B. 43.3 deg. lag
C. 46.7 deg. lead
D. 43.3 deg. Lead
8. Two impedances Zı=2+j4 and Z2=R+j0, are connected in parallel. Determine R so that the pf
of the circuit is 0.9 lagging.
A. 3.2 ohms
B. 4.2 ohms
C. 2.4 ohms
D. 6.4 ohms
9. The power factor of a load on a 120 volt. 60HZ source is raised from 0.707 to 0.866 lagging
by connecting a 53 micro-farad capacitor across the load. What is the true power of the load in
watts?
C. 862
D. 268
А. 286
В. 682
10. A factory has an average demand of 176 kw at 70% power factor. What is the minimum size
of capacitor required to raise the power factor to 95%?
C. 122 KVAR
D. 157 KVAR
A. 165 KVAR
B. 82 KVAR

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