convection
radiation
conduction
All the three
B. radiation
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
the curvature of earth limits the range of reception
the signals are weak
the signals are absorbed by air
the antennae are not powerful enough
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
increases to a great extent
increases slightly
decreases slightly
decreases rapidly
Fusion converts nuclear energy into heat
Fusion demands conditions of extremely high temperature to produce it
Fusion produces large amount of heat
Fusion reactions takes place in the sun
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
frequency is higher
wavelength is smaller
pitch is smaller
air is warmer
refraction of light from them through air
reflection
absorption
All the above
distance from the earth
age
temperature
size
Coulomb
Gilbert
Volta
Rutherford
the resistance
the square of the current flowing through it
the time the current flows
All the above
Neptune
Uranus
Jupiter
Saturn
air
water
iron
vacuum
potential difference
resistance
current
All the above
direct sun's rays
radiation from earth's surface
radiogenic heat (resulting from radioactive decay)
cosmic rays coming from space
speed of sound is greater in steel than in air
speed of sound is greater in air than in steel
part of sound waves is reflected between rail tracks
the boy's ears are at a different distance from the source
travelling in opposite direction
of slightly different frequencies
of equal wavelength
of equal amplitude
speed
frequency
wavelength
All the above
Jupiter
Mercury
Venus
Sirius
a fluid to transmit the braking force
the force applied by the driver
hydrogen gas and not any liquid
a vacuum brake
16 hours
12 hours
20 hours
24 hours
protects the article from atmospheric corrosion
gives it a more attractive appearance
Both (a) and (b) above
None of the above
resistor
thermocouple
light bulb
neon tube
necessary oxygen for burning of oil may be provided
the convection current of air may be maintained to keep the lamp burning
the brightness of the lamp may be increased
All the above
loudness
pitch
quality or timbre
All the above
the temperature is low
there is no air
the pressure is low
All the above
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
the mass of earth
the mass of the satellite
the radius of the earth
gravitation of the earth
increase
decrease
remain unaffected
have its shape changed
centrifugal force
frictional force
gravitational force
distillation