Spherical balls of radius R are falling in a viscous fluid of viscosity \eta with a velocity v. The retarding viscous force acting on the spherical ball is [AIEEE 2004]

Correct Answer is : directly proportional to both radius R and velocity v

inversely proportional to both radius R and velocity v

directly proportional to both radius R and velocity v

directly proportional to R but inversely proportional to v

inversely proportional to R, but directly proportional to velocity v

AIEEE 2004 Physics Solved Paper

Section: Physics

Question : 24 of 78

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Spherical balls of radius R are falling in a viscous fluid of viscosity η with a velocity v. The retarding viscous force acting on the spherical ball is

[AIEEE 2004]

inversely proportional to both radius R and velocity v
directly proportional to both radius R and velocity v
directly proportional to R but inversely proportional to v
inversely proportional to R, but directly proportional to velocity v

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