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.

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter2: Fundamentals

Section: Chapter Questions

Problem 2.7P: Let a 100V sinusoidal source be connected to a series combination of a 3 resistor, an 8 inductor,...

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