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Acceleration of a charged particle of charge q and mass m moving in a uniform electric field of strength E is: 
1. q/mE
2. qE/m
3. m/qE
4. mqE

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Best answer
Correct Answer - Option 2 : qE/m

The correct answer is option 2) i.e. qE/m

CONCEPT:

  • The electric field is defined as the electric force per unit charge
    •  A stationary charge q placed in an electric field intensity of E will experience an electrostatic force (F) given by

F = qE

EXPLANATION:

  • If a particle of mass m accelerates, from Newton's second law we know that the force experienced by this particle, F = ma
  • For a charged particle the force experienced, F = qE

Therefore, qE = ma 

⇒ Acceleration (a) = qE/m

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