A small but measurable current of 1.2 xx 10^(-10) A exists in a copper wire whose diameter is 3.0 mm. The number of charge carriers per unit volume is 8.49 xx 10^(28)m^(-3) m. Assuming the current is uniform, calculate the (a) current density and (b) electron drift speed.

A small but measurable current of 1.2 xx 10^(-10) A exists in a copper

1.	A small but measurable current of 1.2 xx 10^(-10) A exists in a copper wire whose diameter is 3.0 mm. The number of charge carriers per unit volume is 8.49 xx 10^(28)m^(-3) m. Assuming the current is uniform, calculate the (a) current density and (b) electron drift speed.
Answer» ANSWER :(a) `1.7 xx 10^(-5)A//m^(2); (B) 1.3 xx 10^(-15) m//s`

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A small but measurable current of 1.2 xx 10^(-10) A exists in a copper wire whose diameter is 3.0 mm. The number of charge carriers per unit volume is 8.49 xx 10^(28)m^(-3) m. Assuming the current is uniform, calculate the (a) current density and (b) electron drift speed.

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