Complete Study Pack for Engineering Entrances Objective Physics Vol 1>Chapter 13 - Fluid Mechanics>Excercise 2>Q 10

HARD

JEE Main

IMPORTANT

Earn 100

The radius of a soap bubble is $r$ and the surface tension of the soap solution is $S$ . The electric potential to which the soap bubble be raised by charging it so that the pressure inside the bubble becomes equal to the pressure outside the bubble is ( $ε_{0} =$ permittivity of the free space)

50% studentsanswered this correctly

Important Questions on Fluid Mechanics

EASY

JEE Main

IMPORTANT

Complete Study Pack for Engineering Entrances Objective Physics Vol 1>Chapter 13 - Fluid Mechanics>Excercise 2>Q 11

Two light balls are suspended as shown in figure. When a stream of air passes through the space between them, the distance between the balls will

Question Image

MEDIUM

JEE Main

IMPORTANT

Complete Study Pack for Engineering Entrances Objective Physics Vol 1>Chapter 13 - Fluid Mechanics>Excercise 2>Q 12

When a large bubble rises from bottom of a water lake to its surface, then its radius doubles. If the atmospheric pressure is equal to the pressure of height

H

of a certain water column, then the depth of lake will be

MEDIUM

JEE Main

IMPORTANT

Complete Study Pack for Engineering Entrances Objective Physics Vol 1>Chapter 13 - Fluid Mechanics>Excercise 2>Q 13

Eight identical drops of water falling through air with uniform velocity of

10 cm s^{- 1}

combine to form a single drop of big size. Then, the terminal velocity of the big drop will be,

HARD

JEE Main

IMPORTANT

Complete Study Pack for Engineering Entrances Objective Physics Vol 1>Chapter 13 - Fluid Mechanics>Excercise 2>Q 14

Two small drops of mercury each of radius '

R

' collapse to form a large single drop. The ratio of the total surface energies before and after the change is