A hall 35 m x 20 m is to be provided w ith ageneral illum in ation of 130 lux. If the depreciation factoris 1.4 and the coefficient of utilization is 0.50. determine then umber of fluorescentlamps required. Assume lumin ous efficien cy of the fluorescent tube as 50 lum ens per watt for 80-w att lamp.

A hall 35 m x 20 m is to be provided w ith ageneral illum in ation of 130 lux. If the depreciation factoris 1.4 and the coefficient of utilization is 0.50. determine then umber of fluorescentlamps required. Assume lumin ous efficien cy of the fluorescent tube as 50 lum ens per watt for 80-w att lamp.

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter1: Atomic Structure

Section: Chapter Questions

Problem 6RQ: How many valence electrons are generally contained in materials used for insulators?

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