Question:medium
A copper wire with a cross-sectional area of $2 \times 10^{-6}$ m$^2$ has a free electron density equal to $5 \times 10^{22}$/cm$^3$. If this wire carries a current of $16$ A, the drift velocity of the electron is}
A copper wire with a cross-sectional area of $2 \times 10^{-6}$ m$^2$ has a free electron density equal to $5 \times 10^{22}$/cm$^3$. If this wire carries a current of $16$ A, the drift velocity of the electron is}
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Always convert number density from cm$^{-3}$ to m$^{-3}$ by multiplying by $10^6$.
Updated On: May 1, 2026
- $1$ m/s
- $0.1$ m/s
- $0.01$ m/s
- $0.001$ m/s
- $0.0001$ m/s
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The Correct Option is
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