The rate of flow of liquids in a tube of radius r, length l, whose ends are maintained at a pressure difference P is
where η is coefficient of viscosity and Q is
8
1/8
16
1/16
Scent sprayer is based on
Charles' law
Boyle's law
Archimedes' principle
Bernoulli's theorem
Under a constant pressure ,the rate of flow of orderly volume flow of liquid through a capillary tube is V. If the length of the capillary is doubled and the diameter of the bore is halved, the rate of flow would become
V / 4
16 V
V / 8
V / 32
An object is moving through the liquid. The viscous damping force acting on its is proportional to the velocity. Then dimensions of constant of proportionality are
[ ML-1 T--1 ]
[ MLT--1 ]
[ ML0 LT-1 ]
[ ML0 T--1 ]
Extra pressure inside a soap bubble of radius (r) is proportional to
r
1 / r
r2
1 / r2
Which of the following physical quantities do not have the same dimensions ?
pressure and stress
tension and surface tension
strain and angle
energy and work
A candle of diameter d is floating on a liquid in a cylindrical container of diameter D (D>>d) as shown in figure. If it is burning at the rate of 2 cm h-1, then the top of the candle will
remain at the same height
fall at the rate of 1 cm h-1
fall at the rate of 2 cm h-1
go up at the rate of 1 cm h-1
A metallic wire of density floats horizontal in water. The maximum radius of the wire so that the wire may not sink, will be (consider surface tension of water = T);
