Physics MCQs:

1)    A honey drop is falling through the air from a height. Its radius is r, the density of honey is d and the co-efficient of viscosity is η. The viscous force of it will be

a)        1/6πηv²

b)    6πηr/v

c)     6πη/vr

d)    6ππrv

2)    The frictional effect between different layers of moving fluid is called

a)     Density

b)    Force

c)     Viscosity

d)    Surface tension

3)     Velocity of air current is

a)     Greater on lower part of aero plane’s wing

b)    Lower on upper part of aero plane’s wing

c)     Greater on upper part of aero plane’s wing

d)    None of these

1.d

2.c

3.c