Question

write the expression for current density
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Answer 1

Answer:

Current density is defined as the ratio of current flowing in the conductor to the cross-sectional area of the conductor perpendicular to the direction of current flowing.

Relation between current density J and drift speed vd is given by   J=n e vd

where n is the number density of electrons and e is the electronic charge.

Explanation:

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Answer 2

Current density is defined as the ratio of current flowing in the conductor to the cross-sectional area of the conductor perpendicular to the direction of current flowing.

Relation between current density J and drift speed vd is given by J=n e vd

where n is the number density of electrons and e is the electronic charge.

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