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Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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TOPIC: Power Systems, Power Plants & Illumination

INSTRUCTIONS:
- Answer in this format: Given, Illustration, Required Conversion, Solution, Final Answer.
- Step-by-step solution, do not skip even simple calculations to avoid confusion.
- If answered in written form, make sure it is readable.

PROBLEM:
It is required to provide illumination of 150 meter-candle in a factory hall 45m x 15m. Assume that the depreciation factor is 0.80, the coefficient of utilization is 0.40 and the efficiency of the lamp is 20 lumens per watt. Calculate the number of 250-W lamps.

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