Across what direct emf must an impedance coil having a resistance of 20 ohms and an inductance of 0.05h be connected in order that it may take the same power that it takes from a 220V 60HZ mains? A. 120V C. 150V B. 160V D. 140V

Across what direct emf must an impedance coil having a resistance of 20 ohms and an inductance of 0.05h be connected in order that it may take the same power that it takes from a 220V 60HZ mains? A. 120V C. 150V B. 160V D. 140V

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter7: Alternating Current, Power Distribution, And Voltage Systems

Section: Chapter Questions

Problem 7RQ

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Concept explainers

Single Phase AC Circuit

Alternating Current (AC) is a type of electric power in which the electric current changes, both in magnitude and direction, at regular intervals. This AC Circuits can deliver power in either a Single Phase system or a Three Phase system.

Question

Across what direct emf must an impedance coil having a
resistance of 20 ohms and an inductance of 0.05h be connected in
order that it may take the same power that it takes from a 220V
60HZ mains?
Α. 120V
C. 150V
B. 160V
D. 140V

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