0°
30°
45°
60°
C. 45°
Space ship
Lunar module
Radar
Rocket
protects the article from atmospheric corrosion
gives it a more attractive appearance
Both (a) and (b) above
None of the above
a neutron star
a binary star
a dwarf star
a polar star
proton
neutron
electron
positron
the ionised hydrogen molecule
the nucleus of helium atom
the nucleus of hydrogen atom
the positive counterpart of electron
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
is proportional to its original length
is proportional to the increase of temperature
is inversely proportional to its original length
Both (a) and (b) above
it resists oxidation when red hot
its melting point is high
it has got 60 times the resistance of copper
All the above
frequency is higher
wavelength is smaller
pitch is smaller
air is warmer
altimeter
anemometer
dilatometer
potentiometer
convection
radiation
conduction
All the three
wide and shallow
narrow and shallow
wide and deep
narrow and deep
18 km/s
11.2 km /s
21 km/s
35 km/s
Irene Curie
W Bothe and H Becker
James Chadwick
Jean Joliot
greater than the weight of the man
less than the weight of the man
same as the weight of the man
zero
the same as that of an audible sound
above the audible range
below the audible range
None of the above
the water available is hard
it is colder than at sea level
the potatoes become hard
the boiling point of water is lower at that height on account of low atmospheric pressure
Sir Isaac Newton
Kepler
Copernicus
Ptolemy
Marconi
Oersted
Faraday
Ohm
angle of inclination of the earth
changes in radio-active minerals in it
period taken by Sun's light to reach the earth
artificial satellites revolving round the earth
wide and shallow
narrow and shallow
wide and deep
narrow and deep
a high resistance
a very low resistance
no resistance at all
resistance of 400 � w
the ampere
the volt
the ohm
the coulomb
centrifugal force
frictional force
gravitational force
distillation
Neptune and Pluto
Jupiter and Saturn
Venus and Mars
Venus and Saturn
rubber
plastic
aluminium
wood
212°
32°
-40°
0°
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
Frequency
Amplitude
Speed
Wavelength
taking photos of various objects
recording and reproducing three dimensional images
tracing out planets and stars in the sky
transmitting light waves