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  • At room temperature, copper has free electron density of . The electron drift velocity in a copper c

At room temperature, copper has free electron density of 8.4\times 10^{28}m^{-3}. The electron drift velocity in a copper conductor of cross-sectional area 10^{-6}m^{2} and carrying a current of 5.4 A, will be -

Option: 1

4\: ms^{-1}


Option: 2

0.4\: ms^{-1}


Option: 3

4\: cms^{-1}


Option: 4

0.4\: mms^{-1}


Answers (1)

best_answer

\begin{aligned} & \text { Use } \mathrm{i}=\text { ne } A \mathrm{v}_{\mathrm{d}} \\ & \therefore \mathrm{V}_{\mathrm{d}}=\frac{\mathrm{i}}{\mathrm{neA}} \end{aligned}

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Irshad Anwar

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