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Physics - Current Electricity Question with Solution | TestHub

PhysicsCurrent ElectricityMicroscopicEasy2 minPYQ_2012

PhysicsEasysingle choice

Charge passing through a conductor of crosssection area $A = 0.3 m^{2}$ is given by $q = 3 t^{2} + 5 t + 2$ in coulomb, where $t$ is in second. What is the value of drift velocity at $t = 2 s ?$ $($ Given, $m = 2 \times 1 0^{25} / m^{3})$

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Answer:

Solution:

$Given: A = 0.3 m^{2} n = 2 \times 1 0^{25} / m^{3} q = 3 t^{2} + 5 t + 2 i = \frac{dq}{dt} = 6 t + 5 = 17$ Drift velocity, $v_{d} = \frac{i}{neA}$ $= \frac{17}{2 \times 1 0 ^{25} \times 1.6 \times 1 0 ^{- 19} \times 0.3} = \frac{17}{0.96 \times 1 0 ^{6}} = 1.77 \times 1 0^{- 5} m / s$

Stream:VITEEESubject:PhysicsTopic:Current ElectricitySubtopic:Microscopic

⏱ 2mℹ️ Source: PYQ_2012

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