An energy meter makes 100 revolutions of its disc per unit of energy. The number of revolutions made by the disc during one hour when connected across 210 V source and drawing a current of 20 A at 0.8 p.f. leading is ?

An energy meter makes 100 revolutions of its disc per unit of energy. The number of revolutions made by the disc during one hour when connected across 210 V source and drawing a current of 20 A at 0.8 p.f. leading is ?

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter25: Surge, Spike, And Lightning Protection

Section: Chapter Questions

Problem 4RQ: If a voltage spike lasts for 1.5 nanoseconds, what is the frequency of the spike?

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