Question 5 If a current 5.0 A lags the applied voltage 230 V by an angle o, it can be resolved into two components, OA in phase with the voltage and OB lagging by 90°. If the phasor diagram in to a circuit possessing resistance and inductance in series, OA and OB must not be labelled IR and L respectively. It has become the practice to say that the power factor is lagging when the current lags the supply voltage, and leading when the current leads the supply voltage. This means that the supply voltage is regarded as the reference quantity. (b) An inductor coil is connected to a supply of voltage at 50 Hz and takes the total supply current. The coil dissipates 750 W. Calculate: (i) the resistance and the inductance of the coil; (ii) the power factor of the coil.

Question 5 If a current 5.0 A lags the applied voltage 230 V by an angle o, it can be resolved into two components, OA in phase with the voltage and OB lagging by 90°. If the phasor diagram in to a circuit possessing resistance and inductance in series, OA and OB must not be labelled IR and L respectively. It has become the practice to say that the power factor is lagging when the current lags the supply voltage, and leading when the current leads the supply voltage. This means that the supply voltage is regarded as the reference quantity. (b) An inductor coil is connected to a supply of voltage at 50 Hz and takes the total supply current. The coil dissipates 750 W. Calculate: (i) the resistance and the inductance of the coil; (ii) the power factor of the coil.

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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