(D) The number of free electrons per unit volume $(n)$ is given by: $n = \frac{N_A \times \rho}{M} = \frac{6.023 \times 10^{26} \times 10.5 \times 10^

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(D) The number of free electrons per unit volume $(n)$ is given by: $n = \frac{N_A \times \rho}{M} = \frac{6.023 \times 10^{26} \times 10.5 \times 10^3}{108} \approx 5.86 \times 10^{28} \, m^{-3}$. Using the formula for drift velocity $v_d = \frac{I}{n e A}$: $v_d = \frac{20}{(5.86 \times 10^{28}) \times (1.6 \times 10^{-19}) \times (3.14 \times 10^{-6})}$. $v_d = \frac{20}{29.45} \times 10^{-4} \, m/s \approx 6.798 \times 10^{-4} \, m/s$.

Class 12 Physics Current Electricity Current Density, Drift Velocity and Mobility

Easy

The drift velocity of electrons in a silver wire with a cross-sectional area of $3.14 \times 10^{-6} \, m^2$ carrying a current of $20 \, A$ is. Given the atomic weight of $Ag = 108$ and the density of silver $= 10.5 \times 10^3 \, kg/m^3$,the drift velocity is $.......... \times 10^{-4} \, m/s$.

A
$2.798$
B
$67.98$
C
$0.67$
D
$6.798$

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Current Electricity

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Current Density, Drift Velocity and Mobility

$A$ metallic block has no potential difference applied across it. What is the mean velocity of free electrons in terms of $T$ (absolute temperature of the block)?

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Current density in a cylindrical wire of radius $R$ varies with radial distance as $J(r) = \beta(r + r_0)^2$. The current through the shaded section of the wire shown in the figure is:

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In a metallic conductor,under the effect of an applied electric field,the free electrons of the conductor

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$A$ straight conductor of uniform area of cross-section carries a current $I$. If $s$ is the specific charge (charge-to-mass ratio) of the electron,what is the total momentum of all the electrons per unit length of the conductor due to their drift velocity?

EasyAP EAMCET 2017

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For which of the following dependencies of drift velocity $v_d$ on electric field $E$ is Ohm's law obeyed?

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The drift velocity of electrons in a silver wire with a cross-sectional area of $3.14 \times 10^{-6} \, m^2$ carrying a current of $20 \, A$ is. Given the atomic weight of $Ag = 108$ and the density of silver $= 10.5 \times 10^3 \, kg/m^3$,the drift velocity is $.......... \times 10^{-4} \, m/s$.

Similar Questions

$A$ metallic block has no potential difference applied across it. What is the mean velocity of free electrons in terms of $T$ (absolute temperature of the block)?

Current density in a cylindrical wire of radius $R$ varies with radial distance as $J(r) = \beta(r + r_0)^2$. The current through the shaded section of the wire shown in the figure is:

In a metallic conductor,under the effect of an applied electric field,the free electrons of the conductor

$A$ straight conductor of uniform area of cross-section carries a current $I$. If $s$ is the specific charge (charge-to-mass ratio) of the electron,what is the total momentum of all the electrons per unit length of the conductor due to their drift velocity?

For which of the following dependencies of drift velocity $v_d$ on electric field $E$ is Ohm's law obeyed?

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