Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN: 9780133923605
Author: Robert L. Boylestad
Publisher: PEARSON
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. As a design engineer, you are asked to design a lighting system consisting of a 70 W power supply and
two light bulbs as shown in the following figure. You must select the two bulbs of the following three
available bulbs
(b)
R1-80 ohms
R2=150 ohms
R3= 60 ohms
The system should be designed for a minimum cost such that I= 1.15 A ± 3.5%
+
70 W
Power
Supply
cost = $0.50 (Standard size)
cost= $0.70 (standard size)
$0.65 (nonstandard size)
cost=
I
D.Rx
D Ry
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Transcribed Image Text:. As a design engineer, you are asked to design a lighting system consisting of a 70 W power supply and two light bulbs as shown in the following figure. You must select the two bulbs of the following three available bulbs (b) R1-80 ohms R2=150 ohms R3= 60 ohms The system should be designed for a minimum cost such that I= 1.15 A ± 3.5% + 70 W Power Supply cost = $0.50 (Standard size) cost= $0.70 (standard size) $0.65 (nonstandard size) cost= I D.Rx D Ry
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