1.

Define current density. Write its SI unit and dimension

Answer»

Current density—Current density of a conductor is defined as the amount of current passing per unit area of the conductor held to the flow of chares :

It can be expressed as— 

J = I/A

It is a vector quantity.

The S.I. unit of current density is ampere/ metre2 (Am–2)

The dimension of current density is [MºL–2TºA]



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