In Millikan oil drop experiment a charged drop falls with a termin | Filo
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Class 11

Physics

Mechanics

Mechanical Properties of Fluids

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In Millikan oil drop experiment a charged drop falls with a terminal velocity . If an electric field is applied vertically upwards it moves with terminal velocity in upward direction. If electric field reduces to then its terminal velocity will be-

Correct Answer: Option(c)
Solution:

In absence of electric field (i.e. )


In presence of electric field 

When electric field reduced to


After solving , and
We get .
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