A load Z draws 12 kVA at a power factor of 0.856 lagging from a 120-V rms sinusoidal source. Calculate: (a) the average and reactive pow- ers delivered to the load, (b) the peak current, and (c) the load impedance. Solution: (a) Given that pf = cos@=0.856, we obtain the power angle as # = cos¹ 0.856 = 31.13°. If the apparent power is S = 12,000 VA, then the average or real power is P = S cos0= 12,000 x 0.856 10.272 kW =

A load Z draws 12 kVA at a power factor of 0.856 lagging from a 120-V rms sinusoidal source. Calculate: (a) the average and reactive pow- ers delivered to the load, (b) the peak current, and (c) the load impedance. Solution: (a) Given that pf = cos@=0.856, we obtain the power angle as # = cos¹ 0.856 = 31.13°. If the apparent power is S = 12,000 VA, then the average or real power is P = S cos0= 12,000 x 0.856 10.272 kW =

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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Google ls alual Q4/ Find the voltage average and the voltage waveform for the output of the circuit shown below. V-120v (rms) 2.1k.n + Q
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