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Define Current Density. Write an Expression Which Connects Current Density with Drift Speed - Physics (Theory)

Define current density. Write an expression which connects current density with drift speed

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Solution

Current density is defined as current per unit cross-section area of the conductor.

`barJ = I/A`

Relation

`barJ = "ne" barVd`

n →  electron density

Concept: Electrical Resistivity and Conductivity
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