4) A three-phase air-conditioning unit which has 4 kW working power and PF of 0.85 draws 13.06 A.What is the apparent power?Apparent power =5) A three-phase air-conditioning unit which has 4 kW working power and PF of 0.85 draws 13.06 A.What is the peak current?IPeak current =6). A #1/0 THW copper conductor is protected by a circuit breaker rated at 480 V, with a K-factor of 1.3and clearing time of 2 cycles. What is the symmetrical short-circuit current?Current =7) An AC circuit has resistance of 9 02, inductive reactance of 5 02, and capacitive reactance of 2 Q. Whatis the impedance?Impedance =

Answered: 4) A three-phase air-conditioning unit…

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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Question

4) A three-phase air-conditioning unit which has 4 kW working power and PF of 0.85 draws 13.06 A.
What is the apparent power?
Apparent power =
5) A three-phase air-conditioning unit which has 4 kW working power and PF of 0.85 draws 13.06 A.
What is the peak current?
I
Peak current =
6). A #1/0 THW copper conductor is protected by a circuit breaker rated at 480 V, with a K-factor of 1.3
and clearing time of 2 cycles. What is the symmetrical short-circuit current?
Current =
7) An AC circuit has resistance of 9 02, inductive reactance of 5 02, and capacitive reactance of 2 Q. What
is the impedance?
Impedance =

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Given:

Ans.(4)

Power, $P = 4 k W$

Power factor, $\cos ϕ = 0.85$

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