Correct Answer - Option 4 : A/m
2
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
|