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Current Electricity question

2020 · Q139
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Current Electricity question

2020 · Q139

NEETPhysicsCurrent ElectricityMCQ+4 / −1
A charged particle having drift velocity 7.5×\times×10-4 ms-1 in an electric field of 3×\times×10-10 Vm-1 has a mobility in m2 V-1s-1 of :
  1. A
    2.5 ×\times×106
  2. B
    2.5 ×\times×10-6
  3. C
    2.25 ×\times×10-15
  4. D
    2.25 ×\times×1015
View written solutionFree

Correct answer: A

The relation between the mobility and drift velocity is,

Mobility, μ=υdE\mu = {{{\upsilon _d}} \over E}μ=Eυd​​

=7.5×10−43×10−10 = {{7.5 \times {{10}^{ - 4}}} \over {3 \times {{10}^{ - 10}}}}=3×10−107.5×10−4​

=2.5×106m2V−1s−1 = 2.5 \times {10^6}{m^2}{V^{ - 1}}{s^{ - 1}}=2.5×106m2V−1s−1

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