The reading of a dynamometer-type wattmeter with pressure coil phase angle of 2°is 700 watts, when it is used to measure power of a single-phase inductive load supplied by 240 V single-phase a.c. source. When the wattmeter is replaced by a second wattmeter with a phase angle of 1° for the pressure coil circuit, a reading of 620 watts is obtained Calculate the actual power and current taken by the load, assuming all errors of the wattmeter, except those due to pressure coil inductance, are neglected.

The reading of a dynamometer-type wattmeter with pressure coil phase angle of 2°is 700 watts, when it is used to measure power of a single-phase inductive load supplied by 240 V single-phase a.c. source. When the wattmeter is replaced by a second wattmeter with a phase angle of 1° for the pressure coil circuit, a reading of 620 watts is obtained Calculate the actual power and current taken by the load, assuming all errors of the wattmeter, except those due to pressure coil inductance, are neglected.

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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