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The SI unit of electric current density is-
1. A
2. A.m2
3. A/s
4. A/m2

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Correct Answer - Option 4 : A/m2

CONCEPT:

  • Current density (J): The electric current per unit area is called current density.

\(Current~density~\left( J \right)=\frac{Current~\left( I \right)}{Area~\left( A \right)}\)

EXPLANATION:

  • The SI unit of electric current is Ampere (A).
  • The SI unit of area is meter2 (m2).

The SI unit of current density (J) = SI unit of current/SI unit of area = A/m2

Hence option 4 is correct.

 

SYMBOL

UNIT

QUANTITY

E

V/m

Electric field Strength

H

A/m

Magnetic field strength

D

C/m2

Electric flux density

B

T

Magnetic flux density

J

A/m2

Electric current density

K

V/m2

Magnetic current density

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