Question:
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 of $ {10}^{-6}m^{2}$ and carrying a current of 5.4 A, will be
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 of $ {10}^{-6}m^{2}$ and carrying a current of 5.4 A, will be
Updated On: Sep 3, 2024
- $4{ms}^{-1}$
- $0.4{ms}^{-1}$
- $4{cms}^{-1}$
- $0.4{mms}^{-1}$
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The Correct Option is D
Solution and Explanation
Drift velocity in a copper conductor
$V_d=\frac {i}{neA}$= $\frac {5.4}{8.4 \times {10}^{28}\times 1.6 \times {10}^{-19}\times {10}^{-6}}$
$=0.4 \times {10}^{-3}{ms}^{-1}$
$0.4{mms}^{-1}$
$V_d=\frac {i}{neA}$= $\frac {5.4}{8.4 \times {10}^{28}\times 1.6 \times {10}^{-19}\times {10}^{-6}}$
$=0.4 \times {10}^{-3}{ms}^{-1}$
$0.4{mms}^{-1}$
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