An air bubble of radius is rising up at a steady rate of through a liquid of density , the coefficient of viscosity neglecting the density of air, will be ( ) |
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a) |
23.2 units |
b) |
83.5 units |
c) |
334 units |
d) |
167 units |

An air bubble of radius is rising up at a steady rate of through a liquid of density , the coefficient of viscosity neglecting the density of air, will be ( ) |
|||||||

a) |
23.2 units |
b) |
83.5 units |
c) |
334 units |
d) |
167 units |

1 Answer - 5876 Votes

3537

**(d)**

Let a bubble of radius and density is rising up in a liquid whose density is and coefficient of viscosity .

Then effective force acting downward

Viscous force acting upward

Since bubble is moving up with constant velocity , there is no acceleration in it, the net force acting on it must be zero.