increases
decreases
neither increases nor decreases
first increases then decreases
B. decreases
convex mirrors
concave mirrors
concave lenses
lenses irrespective of types
power
kinetic energy
momentum
impulse
sugar
sodium carbonate
common salt
carbonates of calcium and magnesium
electroplating
electrotyping
electrolysis
distillation
reduction of seating capacity in the hall
increase of sound intensity in the hall
lining the walls, with leather panels put on over a layer of sound absorbent glass fibre
by opening the doors and windows of concert hall
Lens
Iris
Retina
Eyelid
rubber
plastic
aluminium
wood
the chemical reaction between the gases inside the bulb
the compressed gases inside rushing out suddenly
the air outside rushing in to fill the vacuum inside the bulb
None of the above
convex mirrors
concave mirrors
convex lens
concave lens
the centripetal force
the centrifugal force
the frictional force
All the above
surface tension
capillarity
viscosity
diffusion
Wilhelm Roentgen
WO Coolidge
Henry Cavendish
William Watson
equal to half its focal length
equal to its focal length
twice its focal length
not related to its focal length
a glass rod with flannel
an abonite rod with flannel
a glass rod with silk
Any of the above
lead
zinc
carbon
tin
linear motion
vibratory motion
rotational motion
None of the above
INSAT
Bhaskara
Aryabhatta
All the above
power
velocity
energy widely used in nuclear physics
number of electrons
the material of the wire
the length of the wire
the cross section of the wire
All the above
used by warships and military aircraft to locate enemy submarines
used by ships to determine the depth of water beneath them
a detective device that uses sound to locate under - water objects
All the above
they contain free electrons
their atoms are relatively far apart
their atoms collide frequently
they have reflecting surfaces
first rise and then fall
fall
remain the same
rise
temperature of air
intensity of light
density of a liquid
relative humidity of the atmosphere
pouring ice cold water into the inner tumbler
pouring ice cold water on the outer tumbler
pouring hot water into the inner tumbler
dipping both the tumblers in hot water
Marconi
Baird
John Bardeen, Walter H. Brattain and William Shockley
Edison
adhesion
surface tension
gravitational force
atmospheric pressure from all sides
planets do not have light of their own whereas stars shine by their own light
planets do not twinkle like stars
planets are much smaller than stars
All the above
the speed with which it escapes cools it down
of the higher temperature of the surroundings
of sudden expansion causing loss of internal energy
there is no real fall in temperature
it is pleasing to the eye
it has a traditional colour
it is easily distinguishable
it is most sensitive to the human eye
warm and moist
cool and dry
warm and dry
cool and moist