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MMLU-Pro / 11777 / A brass rod with a circular cross section of radius 2.1 cm carriesa sinusoidal…

Problem

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question

A brass rod with a circular cross section of radius 2.1 cm carriesa sinusoidal current at a frequency of 1590 cycles per second. The axial drift current density J is approximately J = 0.01e^\pir sin (\omegat+\pir) ampere/cm^2 with\omega = 10^4 and r representing the distance in centimeters fromthe center of the wire. Find the dissipated power per centimeterof length. The conductivity of brass is 1.57 × 10^5 mhos/cm.

category

engineering

options

  1. 6.28 micro watt/cm
  2. 2.44 micro watt/cm
  3. 31.8 micro watt/cm
  4. 12.2 micro watt/cm
  5. 4.15 micro watt/cm
  6. 8.75 micro watt/cm
  7. 5.06 micro watt/cm
  8. 3.31 micro watt/cm
  9. 9.67 micro watt/cm
  10. 1.59 micro watt/cm

src

stemez-Electromagnetics

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