half
one fourth
four times
two times
C. four times
mercury thermometers
alcohol thermometers
platinum resistance thermometers
thermoelectric thermometers
transverse
longitudinal
transverse and longitudinal
neither transverse nor longitudinal
will increase
will decrease
will have no change
will either increase or decrease
a -rays
� -rays
? -rays
X-rays
Microphone converts sound energy into electrical energy.
Electric fan converts electrical energy into mechanical energy.
Battery converts chemical energy into electrical energy.
All the above
for measuring relative density of liquids
by ships to pass on messages
for determining the depth of ocean bottoms etc.
by deaf people to aid hearing
a hydrometer
a manometer
a lactometer
an anemometer
high resistance and high melting point
high resistance and low melting point
low resistance and high melting point
low resistance and low melting point
Earth and Mars
Venus and Earth
Mars and Jupiter
Moon and Mars
at the middle
at a point away from the hinge (near the rim)
near the hinge
None of the above
does not allow the lightning to fall on the building at all
drives away the charged clouds
forces the lightning to fall on other buildings near that building
conducts the electric charges to the ground when lightning strikes the building
the gun moves forward
the gun jumps up
the gun does not move
the gun recoils with the same momentum as the bullet
at the lower elevation than the bird
at a higher elevation than the bird
in the same direction as the bird
vertically upwards
the least scattered red colour reaching the eye
the dispersion of sun light occurred in air molecule in atmosphere
the diffraction of sunrays in atmospheric layers
interference of all the rays coming from the sun
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
good conductor of heat
good conductor of electricity
bad conductor of electricity
Both (a) and (b) above
0 K
273 K
373 K
100 K
the necessary centrifugal force may be obtained from the horizontal component of the weight of the train
the frictional force between the track and the wheels is avoided
the necessary centripetal force may be derived from the horizontal component of the weight of the train
None of these
Red
Blue
Yellow
Violet
air
water
iron
vacuum
kinetic energy
potential energy
momentum
both potential and kinetic energy
potential difference
resistance
current
All the above
it absorbs sun's rays
it reflects sun's rays
it retains the heat inside by the greenhouse effect
it radiates heat better than metals
Dalton
Rutherford
Einstein
Planck
frequency is higher
wavelength is smaller
pitch is smaller
air is warmer
look like falling stars
are really pieces of rock or metal
burn up as they shoot through the air
All the above
elliptical
a straight line
a parabola
a vertical line
Physics
Chemistry
Biology
Economic
10-10 cm
10-12 cm
10-13 cm
10-16 cm
it has high thermal conductivity
it has uniform expansivity
it has high boiling point and low freezing point
of all the above