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Drift velocity in metal is
  • a)
    inversely proportional to the force on an electron due to applied electric field
  • b)
    directly proportional to the mass of an electron 
  • c)
    proportional to the mobility of an electron
  • d)
    inversely proportional to the strength of the applied electric field
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Drift velocity in metal isa)inversely proportional to the force on an ...
Concept:
The drift velocity is directly proportional to the electric field, i.e.
Vd ∝ E
Vd = μE
The proportionality constant 'μ' defined as:
Observation: 
  • Drift velocity is proportional to the mobility of the electron, i.e. more the mobility, the more will be the drift velocity.
  • Drift velocity is directly proportional to the electric field applied.
  • Drift velocity is inversely proportional to the mass of the electron.
Notes:
  • Mobility defines how quickly can an electron move in metal or semiconductor under the influence of the electric field.
  • When an electric field is applied, the electrons and holes are accelerated by it.
  • The electron moving with a finite average velocity is called drift velocity.
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Drift velocity in metal isa)inversely proportional to the force on an electron due to applied electric fieldb)directly proportional to the mass of an electronc)proportional to the mobility of an electrond)inversely proportional to the strength of the applied electric fieldCorrect answer is option 'C'. Can you explain this answer?
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