1.

Give the SI unit of current density and its dimensional formula.

A. Am<sup>-2</sup>, [A<sup>1</sup>L<sup>-2</sup>]
B. Am<sup>2</sup>, [A<sup>1</sup>L<sup>2</sup>]
C. Am<sup>-1</sup>, [A<sup>1</sup>L<sup>-1</sup>]
D. Am<sup>1</sup>, [A<sup>1</sup>L<sup>1</sup>]
Answer» B. Am<sup>2</sup>, [A<sup>1</sup>L<sup>2</sup>]


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