helium
argon
hydrogen
oxygen
C. hydrogen
kinetic energy
potential energy
momentum
both potential and kinetic energy
the pores in the pot are closed
rain water stops oozing out from the pores
the water that oozes out does not evaporate quickly because of the large percentage of moisture in the air
surface of the pot becomes damp
1985
1957
1959
1960
travelling in opposite direction
of slightly different frequencies
of equal wavelength
of equal amplitude
a straight line
an ellipse
a circle
a parabola
the pores in the pot are closed
rain water stops oozing out from the pores
the water that oozes out does not evaporate quickly because of the large percentage of moisture in the air
surface of the pot becomes damp
virtual and upright
virtual and inverted
real and inverted
real and upright
a microphone
a headphone
a phonograph
an amplifier
�± -rays
�² -rays
�³ -rays
Cosmic rays
its density
its temperature
its elasticity
All the above
increases
decreases
neither increases nor decreases
first increases then decreases
doppler effect
beats
resonance
echo
turbulence caused by the wind
buoyancy of air
unequal pressures acting on it
sudden change in the direction of the wind
4 x 108 m/s
1500 m/s
330 m/s
500 m/s
mercury
distilled water
alcohol
does not use any liquid
in air
in an atmosphere of oxygen
in an atmosphere of CO2
in vacuum
2 minutes
4 minutes
12 minutes
8 minutes
the nature of the liquid
area of the exposed surface of the liquid
temperature of air and of the liquid
All the above
absorbs
refracts
reflects
scatters
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
the sea contains a large amount of other salts besides sodium chloride
the density of the person is less than the density of the Dead Sea water
of the surface tension due to salt water in the Dead Sea
of difference in mass
it stops due to malfunctioning
it starts emitting dangerous radioactive radiations
it is shut down to avoid explosion
it is ready to produce controlled energy
both its mass and weight will be different
its mass will be different but the weight will remain the same
its mass and weight will both remain unchanged
its mass will remain the same but weight will be different
rough white
rough black
shining white
shining black
a neutron star
a binary star
a dwarf star
a polar star
oxidation of the tungsten filament
bursting of the bulb
loss of light due to absorption
keeping the weight of the bulb less
so that they may reflect thermal radiation from outside and minimise such radiation from them
so that they may absorb all radiation from outside
to make them attractive to look at
because they take high polish
Irene Curie
W Bothe and H Becker
James Chadwick
Jean Joliot
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
the loudness of the sound increases
the loudness remains the same
the loudness decreases
the sound suddenly stops