Coulomb
Gilbert
Volta
Rutherford
A. Coulomb
taking photos of various objects
recording and reproducing three dimensional images
tracing out planets and stars in the sky
transmitting light waves
Rutherford
Bohr
Henri Bacquerel
Marie Curie
the reflection of sound waves
the refraction of sound waves
the interference of sound waves
reverberation of sound waves
the eye lens being thin
the eye lens being thick
lack of symmetry in the curvature of the eye preventing rays of light from being brought to a common focus
the pupil being very small
historical sites
architecture
sound
trigonometry
Earth and Mars
Venus and Earth
Mars and Jupiter
Moon and Mars
light comes through circular gaps between the leaves
the leaves are circular
the rays bend to form circular spots
the gaps between the leaves act as pin holes
lowers the melting point of ice
raises the melting point of ice
has no effect on the melting point of ice
may lower or raise the melting point depending upon the type of impurities
good conductor of heat
good conductor of electricity
bad conductor of electricity
Both (a) and (b) above
amplitude
vibration
frequency
phase
a reflecting elliptical portion
a reflecting spherical surface
a parabolic reflecting surface
a flat reflecting surface
purity
hardness
high density
high refractive index and low critical angle
rectilinear propagation of light
reflection
refraction
total internal reflection
directly proportional to its pressure
inversely proportional to the square root of its pressure
directly proportional to the square root of its pressure
independent of its pressure
force on each square centimetre of the small piston is less than the force on each square centimetre of the large piston
the distance the small piston moves is equal to the distance the large piston moves
applied pressure is equally transmitted throughout the liquid in all directions
force acting on small piston is equal to the force acting on large piston
increasing the length of the coiled wire
increasing current supply
increasing the size of the iron core
All the above
will increase
will decrease
will have no change
will either increase or decrease
the centripetal force
the centrifugal force
the frictional force
All the above
for automatically maintaining a steady temperature
for measuring electricity
to reduce the voltage of electricity
for producing heat
fish are cold-blooded animals
ice is a bad conductor of heat
there will always be water just beneath the ice level
they can adapt themselves to live in ice
similar charges of electricity rush towards each other and then get repelled
clouds strike against impurities in air and the friction burns up these impurities
strong opposite charges in different clouds break down the resistance offered by the intervening air
water vapour produces electricity in the clouds
Michael Faraday
Torricelli
Thomas Alva Edison
Benjamin Franklin
as an accelerator for imparting energies to charged particles of atomic magnitudes
to reduce the charge on a particle
to produce intense magnetic field
to produce intense electrical field
there is no moisture in the atmosphere
clouds absorb the falling dew
objects emit radiant energy very fast on such nights
objects lose less radiant energy
decreasing the radius of the capillary tube
increasing the radius of the capillary tube
increasing the height of water in the vessel
None of these
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
increase
decrease
remain the same
first decrease and then increase
It will go down
It will come up
It will remain at the same level
First it will go down and it will come up
wide and shallow
narrow and shallow
wide and deep
narrow and deep
cohesive force
surface tension
diffusion
viscosity