BCECE Medical BCECE Medical Solved Papers-2009

  • question_answer
    In Millikans oil drop experiment, an oil drop is observed to move vertically upwards. The upward motion of the drop is due to

    A)  gravity 

    B)  viscosity

    C)  buoyancy        

    D)  electric field

    Correct Answer: D

    Solution :

    In Millikans oil drop experiment the electric field is applied between the plates, the negatively charged oil drop carrying a charge will experience electrostatic force or attraction in upward direction. If the magnitude of electrostatic force is greater than that of gravitational force, the oil drop will start moving in upward direction.


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