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Physics - Current Electricity Question with Solution | TestHub

PhysicsCurrent ElectricityMicroscopicEasy2 minPYQ_2020

PhysicsEasysingle choice

The drift velocity of the electrons in a copper wire of length $2 m$ under the application of a potential difference of $220 V$ is $0.5$ ${m s}^{- 1}$ . Their mobility ( $i n m^{2} V^{- 1} s^{- 1}$ )

Options:

Answer:

Solution:

Drift velocity=mobility× intensity of the electric field

or $v_{d} = μ E o r μ = \frac{v_{d}}{E}$

$o r μ = \frac{v_{d}}{V / l} (∵ E = \frac{V}{l})$

$∴ μ = \frac{0.5 \times 2}{220} = 4.5 \times 10^{- 3} m^{2} V^{- 1} s^{- 1}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Current ElectricitySubtopic:Microscopic

⏱ 2mℹ️ Source: PYQ_2020

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