A coaxial cable has an inner conductor of radius a, and outer thin cylindrical shell of radius b. A steady current I flows in the inner conductor and returns in the outer conductor. Consider the following two cases, A and B, which describe how current is flowing though the structure. In case A the current in the inner conductor is distributed only on the surface. In case B current in the inner cylinder is dist uted uniformly over its cross-section. Which of the following statements about the two cases is correct (select all that apply)? The self-inductance per unit length of the cable cannot be determined unless the current is varying in time The magnetic field strength in the region inside the outer conductor depends on whether case A or case B is in effect The self-inductance per unit length of the cable depends on whether case A or case B is in effect The self inductance per unit length of the cable is infinite

A coaxial cable has an inner conductor of radius a, and outer thin cylindrical shell of radius b. A steady current I flows in the inner conductor and returns in the outer conductor. Consider the following two cases, A and B, which describe how current is flowing though the structure. In case A the current in the inner conductor is distributed only on the surface. In case B current in the inner cylinder is dist uted uniformly over its cross-section. Which of the following statements about the two cases is correct (select all that apply)? The self-inductance per unit length of the cable cannot be determined unless the current is varying in time The magnetic field strength in the region inside the outer conductor depends on whether case A or case B is in effect The self-inductance per unit length of the cable depends on whether case A or case B is in effect The self inductance per unit length of the cable is infinite

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter4: Transmission Line Parameters

Section: Chapter Questions

Problem 4.1P: The Aluminum Electrical Conductor Handbook lists a dc resistance of 0.01558 ohm per 1000 ft at 20C...

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The Aluminum Electrical Conductor Handbook lists a dc resistance of 0.01558 ohm per 1000 ft at 20C and a 60-Hz resistance of 0.0956 ohm per mile at 50C for the all-aluminum Marigold conductor, which has 61 strands and whose size is 1113 kcmil. Assuming an increase in resistance of 2 for spiraling, calculate and verify the dc resistance. Then calculate the dc resistance at 50C, and determine the percentage increase due to skin effect.
The magnetic field intensities inside and outside of a long and smooth conductor with a cross section radius are as follows. Accordingly, find the current densities J inside and outside the conductor. (Hint: Use cylindrical coordinates)
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