The drift velocity of electron in a copper wire of length 2m under the application of a potential difference of 200 V is 0.5 ms -1 Their mobility is (in m2V-1 s-1)

Question

The drift velocity of electron in a copper wire of length 2m under the application of a potential difference of 200 V is 0.5 ms -1 Their mobility is (in m2V-1 s-1) (A) 2.5 × 10-3 (B) 2.5 × 10-2 (C) 5 × 10-2 (D) 5 × 10-3

Tardigrade Admin · Accepted Answer

Mobility μ=(vd/E) V=200 V v d =0.5 ms -1 ℓ=2 m As we know: E =( V /ℓ) ⇒ μ=( v d / V ) × l μ=(0.5/200) × 2=5 × 10-3 m 2 V -1 s -1

Q. The drift velocity of electron in a copper wire of length $2 m$ under the application of a potential difference of $200 V$ is $0.5 m s^{- 1}$ Their mobility is (in $m^{2} V^{- 1} s^{- 1})$

$2.5 \times 1 0^{- 3}$

$2.5 \times 1 0^{- 2}$

$5 \times 1 0^{- 2}$

$5 \times 1 0^{- 3}$

Mobility $μ = \frac{v _{d}}{E}$
$V = 200 V$ $v_{d} = 0.5 m s^{- 1}$ $ℓ = 2 m$
As we know: $E = \frac{V}{ℓ}$
$\Rightarrow μ = \frac{v _{d}}{V} \times l$
$μ = \frac{0.5}{200} \times 2 = 5 \times 1 0^{- 3} m^{2} V^{- 1} s^{- 1}$

Q. The drift velocity of electron in a copper wire of length 2m under the application of a potential difference of 200V is 0.5ms−1 Their mobility is (in m2V−1s−1)

2.5×10−3

2.5×10−2

5×10−2

5×10−3