The velocity of falling rain drop attain limited value because of:
A
Surface tension
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B
Upthrust due to air
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C
Viscous force exerted by air
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D
Air current
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Solution
The correct option is C Viscous force exerted by air Falling drop attains the limited value of velocity (terminal velocity), as forces acting on it get balanced when viscous drag by the air equals the weight of the drop. So the correct option is C.