Unayak posted an Question
March 11, 2020 • 00:14 am 30 points
  • CSIR NET
  • Physical Sciences

Why area element taken here is 2pirdr.

why area element taken here is 2pirdr.plz do the curl and integration completely.

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    Somnath best-answer

    Current density is defined as the amount of electric current flowing per unit cross-sectional area of a material. For a cylinder the cross section is circular. For a circle the elementary area is 2pir dr.

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