On the Moon, an astronaut cannot drink lemonade with the help of straw because
acceleration due to gravity on the Moon is less
there is no atmosphere on the Moon
lemonade evaporates instantaneously on the Moon
None of the above
B.
there is no atmosphere on the Moon
What type of mirror is used in a view finding mirror of a vehicle?
Paraboloidal mirror
Convex mirror
Plane mirror
Concave mirror
A concave lens always forms an image which is
real and erect
virtual and erect
real and inverted
virtual and inverted
Earth is a very big magnet. In which direction does its magnetic field extend?
East to West
West to East
North to South
South to North
Which colour/colour of light has the highest velocity through vaccum?
Blue
Red
Green
All of these
If input frequency of a full wave rectifier be n, then output frequency would be
n/2
n
3n/2
2n
The propagation of sound waves in a gas involves
adiabatic compression and rarefaction
isothermal compression and rarefaction
isochoric compression and rarefaction
isobaric compression and rarefaction
The modulus of rigidity is the ratio of
longitudinal stress to longitudinal strain
volume stress to volume strain
shearing stress to shearing strain
tensile stress to tensile strain
The function of ball bearings in a wheel is
to increase friction
to convert kinetic friction into rolling friction
to convert static friction into kinetic friction
just for convenience
