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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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 ?
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