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4. Calculate the resistance of a 100 m length of wire having a uniform cross - sectional area of 0.02 mm2 and having a resistivity of 40 micro ohm.cmil. If the wire is drawn out to four time its original length, calculate its new resistance.

4. Calculate the resistance of a 100 m length of wire having a uniform cross - sectional area of 0.02 mm2 and having a resistivity of 40 micro ohm.cmil. If the wire is drawn out to four time its original length, calculate its new resistance.

Introductory Circuit Analysis (13th Edition)
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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2 The tungsten filament in an incandescent lamp has a resistance of 9.8 ohms at a room temperature of 20°C and resistance of 132 ohms at normal operating lemperature. Calculate the temperature of the heated filament. (a = 0.0045). %3D Four loads A, B, C, andD are connected in parallel. Given the following specifications: RA = 30 ohms, Rs = 25 ohms, Rc=20, Ro= 15 ohms, and lc=5.5 amps. Calculate (a) the total resistance, (b) , Is, and lp. (c) the total current (d) the power in each resistor and (e) voltage source. 4. Calculate the resistance of a 100 m length of wire having a uniform cross sectional area of 0.02 mm2 and having a resistivity of 40 micro ohm.cmil. If the wire is drawn out to four time its original length, calculate its new resistance. 5. A 1,000 - ft length of copper wire (p = 10.37 N- CM/ft) has a resistance of 40.8 ohms. What would be the resistance of the aluminum wire (p 17 0-CM/ft) of a similar cross-sectional area having a length of 500 f?
Transcribed Image Text:2 The tungsten filament in an incandescent lamp has a resistance of 9.8 ohms at a room temperature of 20°C and resistance of 132 ohms at normal operating lemperature. Calculate the temperature of the heated filament. (a = 0.0045). %3D Four loads A, B, C, andD are connected in parallel. Given the following specifications: RA = 30 ohms, Rs = 25 ohms, Rc=20, Ro= 15 ohms, and lc=5.5 amps. Calculate (a) the total resistance, (b) , Is, and lp. (c) the total current (d) the power in each resistor and (e) voltage source. 4. Calculate the resistance of a 100 m length of wire having a uniform cross sectional area of 0.02 mm2 and having a resistivity of 40 micro ohm.cmil. If the wire is drawn out to four time its original length, calculate its new resistance. 5. A 1,000 - ft length of copper wire (p = 10.37 N- CM/ft) has a resistance of 40.8 ohms. What would be the resistance of the aluminum wire (p 17 0-CM/ft) of a similar cross-sectional area having a length of 500 f?
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