Question Text
Question 1 :
The unit of the coefficient of viscosity in S.I. system is:<br/>
Question 2 :
According to Stoke‘s law, the viscous drag force, on an oil drop is proportional to:<br/>
Question 3 :
The end of a glass tube becomes round on heating due to:
Question 4 :
The work done in blowing a soap bubble of radius $r$ of the solution of surface tension $T$ will be<br/>
Question 5 :
The excess pressure due to surface tension in a spherical liquid drop of radius $r$ is directly proportional to<br>
Question 7 :
If air is blown with a straw under  the pans of a physical balance present in equilibrium position,then that pan :<br/>
Question 8 :
A drop of mercury of radius $2 mm$ is split into 8 identical droplets. Find the increase in surface energy. (Surface tension of mercury is $0.465{ J/m }^{ 2 }$)
Question 9 :
Eight small drops, each of radius $r$ and having same charge $q$ are combined to form a big drop. The ratio between the potentials of the bigger drop and the smaller drop is