A) directly proportional to radius R but inversely proportional to velocity v
B) directly proportional to both radius R and to velocity v
C) inversely proportional to both radius R and velocity v
D) inversely proportional to radius R but directly proportional to velocity v
Correct Answer: B
Solution :
From Stokes law, viscous force \[F=6\pi \eta Rv\] \[\therefore \] \[F\propto R\] and \[F\propto v\]You need to login to perform this action.
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