In Millikan’s oil drop experiment, the oil drop stops if:
A
Electrostatic force = viscous force
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B
Electrostatic force = magnetic force
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C
Magnetic force = viscous force
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D
Electrostatic force = gravitational force
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Solution
The correct option is D Electrostatic force = gravitational force In Millikan’s oil drop experiment, the oil drop stops if gravitational force becomes equal to electrostatic force.