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A rain drop radius 0.3mm falling vertica...

A rain drop radius `0.3mm` falling vertically downwards in air has a terminal velocity of `1(m)/(s)` The viscosity of air is `18xx10^-5` poise. The viscous force on the drop is

A

`101.73xx10^-4den e`

B

`101.73xx10^-5dyn e`

C

`16.95xx10^-5den e`

D

`16.95xx10^-4dyn e`

Text Solution

Verified by Experts

The correct Answer is:
A
Viscous force`=6pietarv=6pixx18xx10^-5xx0.03xx100`
`=101.73xx10^-4` deyne
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