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Physics - Current Electricity Question with Solution | TestHub

PhysicsCurrent ElectricityMicroscopicEasy2 minPYQ_2020

PhysicsEasysingle choice

At room temperature, copper has free electron density of $8.4 \times 10^{28} m^{- 3}$ . The electron drift velocity in a copper conductor of cross-sectional area $10^{- 6} m^{2}$ and carrying a current of $5.4 A$ , will be -

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Answer:

Solution:

Use $i = n e {A v}_{d}$

$∴ v_{d} = \frac{i}{n e A}$

$v_{d} = \frac{5.4}{8.4 \times 10^{28} \times 1.6 \times 10^{- 19} \times 10^{- 6}}$

$v_{d} = \frac{5.4 \times 10^{- 3}}{8.4 \times 1.6}$

$v_{d} = 0.4 m m s^{- 1}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Current ElectricitySubtopic:Microscopic

⏱ 2mℹ️ Source: PYQ_2020

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