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Question

Current density is a:
  1. Vector expressed in Am1
  2. Scalar expressed in Am2
  3. Vector expressed in Am2
  4. Scalar expressed in Am1

A
Scalar expressed in Am1
B
Vector expressed in Am1
C
Vector expressed in Am2
D
Scalar expressed in Am2
Solution
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Current density is a vector quantity and is defined as the the current flowing per unit area of cross section flowing perpendicular to cross section.

SI unit of current density is j=Iarea=A/m2

Answer-(C)

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