A 1,200 mm long copper wire has a cross-sectional radius of 0.5 cm. (a) What is the resistance of thewire? (resistivity = 1.868 x 10^ -8 at 30-degree Celsius, alpha = 0.0086). (b) What is the resistance at60-degree Celsius? (c) If 350 mA of current flow through the wire, what does the voltage drop of thewire at 30-degree Celsius? And (d) What is the voltage drop per meter at 30-degree Celsius?

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Answered: A 1,200 mm long copper wire has a…

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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A rectangular aluminum bus bar is 0.9m long, 0.15 m wide, 0.013m (1.3cm) thick. If the current in the bus bar flows along its length, and the conductivity (σ) of aluminum is 3.57x10^8 S/m. Calculate the bus bar resistance in µΩ.
A copper wire at 20 degrees C, and 164 cmil, has a K value of 10.4 ohms per mi-foot. If the distance to the load is 600 feet (183 m) calculate the resistance of the loop.
Design a 1500-meter-long electrical transmission line with a cross-section size of 0.00199 cm2 that can carry a 50-amp current with a power loss of no more than 5 x105 W. Table 1 shows the electrical conductivity of a variety of materials. What kind of material could be a good candidate?
5. A long copper wire carries a current of 20A which is evenly distributed in each cross-section of the wire. If the diameter of the wire is 4 mm, and the resistance per unit length is 5 Q2/km, calculate the energy density of the magnetic and electric fields on the surface of the wire!
A copper bar of rectangular cross section 2cm by 8 cm and length 200 cm has a voltage dropof 50 μV. Find the resistance, current, current density, electric field intensity, and conduction electron drift velocity.(σcopper=5.96x10⁷ S/m, μe= 30 cm²/V-s)
A wire of diameter 1mm and conductivity 5x107 S/m has 1029 free electrons /m3 when an electric field of 10mV/m is applied. Determine: (a) current density (b) current in the wire (c) charge density of free electrons
A copper wire of 2mm diameter with conductivity of 5.8*10 7S/m and electron mobility of 0.00032m 2 / V-s is subjected to anelectric field of 20mV/m. Find(i) The charge density of free electrons(ii) The current density(iii) The current flowing in the wire(iv) The electron drift velocity
Solve the following problems with complete solutions and units using 2 decimal digits: A 1,000 ft. of aluminum wire, whose diameter is 0.365 in., has a resistance of 0.13 Ω at 20°C. What is its percent conductivity?
A 20 kW, 220 volt, single phase resistance oven uses circular nichrome wire as its heating element. If the temperature of the wire is 1127° and the temperature of the charge is 427°, find the diameter and length of the wire required. Assume radiating efficiency 0.6 and emissivity 0.9. The specific resistance of nichrome alloy is 1.09 x 10^-6Ωm.
The wires of our appliances are insulated with a material mixed with rubber, which has a very high resistivity. If a certain wire has a length of 2.5 m and the outer diameter is 5mm and its inner diameter is 0.5mm, what is its resistance? Note that the inner diameter is present to leave a hallow place where conducting wire ( usually copper) is present. Follow the format: Given: Required: Equation: Solution: Answer:
A given fuel cell has continuous 150 A DC, an operating voltage of 0.55 V, and an overall internal resistance of 3 mΩ at 1.4 A/cm^2 current density. Calculate the potential loss from ohmic resistance, in volts, at this condition. (choose one of the following). (a) 1.05 V (b) 0.50 V (c) 0.55 V
an electrical conductor with a cross-sectional area of 10 mm^2 has a resistance of 1.72 ohm per kilometer 0f length. what is the resistance of 200 m of wire of the same material with a cross-sectional area of 4 mm^2

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