fundamentals of electric circuits 2장 problems 솔루션(4판)-Alexander sadiku /chapter2.fourth edition
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fundamentals of electric circuits 2장 problems 솔루션(4판)-Alexander sadiku /chapter2.fourth edition 입니다. 문제해답+풀이에요 공부하는데 참고하세요
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Chapter 2, Problem 1.
The voltage across a 5-kΩ resistor is 16 V. Find the current through the resistor.
Chapter 2, Solution 1
v = iR i = v/R = (16/5) mA = 3.2 mA
Chapter 2, Problem 2.
Find the hot resistance of a lightbulb rated 60 W, 120 V.
Chapter 2, Solution 2
p = v2/R → R = v2/p = 14400/60 = 240 ohms
Chapter 2, Problem 3.
A bar of silicon is 4 cm long with a circular cross section. If the resistance of the bar is 240 Ω at room temperature, what is the cross-sectional radius of the bar?
Chapter 2, Solution 3
For silicon, 26.410xρ=Ω-m. 2Arπ=. Hence,
22226.4104100.033953240LLLxxxRrArRxρρρπππ−==⎯⎯→===
r = 0.1843 m
Chapter 2, Problem 4.
(a) Calculate current i in Fig. 2.68 when the switch is in position 1.
(b) Find the current when the switch is in position 2.
Chapter 2, Solution 4
(a) i = 3/100 = 30 mA
(b) i = 3/150 = 20 mA
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