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Physics - Current Electricity Question with Solution | TestHub

PhysicsCurrent ElectricityMicroscopicEasy2 minPYQ_2023

PhysicsEasysingle choice

A copper wire of radius $1 mm$ contains $1 0^{22}$ free electrons per cubic metre. The drift velocity for free electrons when $10 A$ current flows through the wire will be (Given, charge on electron $= 1.6 \times 1 0^{- 19} C$ )NEET 2023 (Manipur)

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Solution:

$V_{d} = \frac{i}{n e A}$ $V_{d} = \frac{10}{1 0 ^{22} \times 1.6 \times 1 0 ^{- 19} \times π ( 1 0 ^{- 3} ) ^{2}} V_{d} = \frac{10}{1.6 π \times 1 0 ^{- 3}} = \frac{6.25}{π} \times 1 0^{3} m / s$

Stream:NEETSubject:PhysicsTopic:Current ElectricitySubtopic:Microscopic

⏱ 2mℹ️ Source: PYQ_2023

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