the mass number
atomic number
atomic weight
absolute number
B. atomic number
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 ice that deposits on the freezer
the evaporation of a volatile liquid
None of the above
Both (a) and (b)
as soon as he hears the report of the gun
the moment he sees the flash
either (a) or (b) since that makes no difference
None of the above
Liquid ammonia
Carbon tetrafluoride
Dichloro-difluoro-methane
Sulphur dioxide
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 air circulated by the fan is cool
the fan produces convection currents of air
the air circulated by the fan quickens the evaporation of the moisture on our skin
the air takes away the heat from our body
a microscope
a telescope
a stereoscope
a spectroscope
historical sites
architecture
sound
trigonometry
at the lower elevation than the bird
at a higher elevation than the bird
in the same direction as the bird
vertically upwards
lost all its potential energy and gained an equivalent amount of kinetic energy
gained potential energy and lost kinetic energy
gained kinetic energy as well as potential energy
lost kinetic energy as well as potential energy
12N
2N
10N
6N
Joule
Newton
Joule/Sec
Erg/Sec
mininuclear reactor
a dynamo
a thermopile
solar cells
the chemical reaction between the gases inside the bulb
the compressed gases inside rushing out suddenly
the air outside rushing in to fill the vacuum inside the bulb
None of the above
1000 km
1500 km
2000 km
500 km
1985
1957
1959
1960
refraction of light from them through air
reflection
absorption
All the above
the ringing is not loud enough
the glass of the bell jar absorbs the sound waves
the bell jar is too small
there is no air or -any other gas in the bell jar
loudness
pitch
quality or timbre
All the above
Newton
Pascal
Archimedes
Galileo
cohesive force
surface tension
diffusion
viscosity
power
kinetic energy
momentum
impulse
Bernoulli's principle
Magnetic properties of the ship's material
Newton's third law of motion
Earth's gravitational force
same number of protons but different number of neutrons
same number of neutrons but different number of protons
the same total number of protons and neutrons
same number of protons and different number of electrons
cannot be attained experimentally
can be attained
is impossible
Does not exist at all
planets do not have light of their own whereas stars shine by their own light
planets do not twinkle like stars
planets are much smaller than stars
All the above
the time for the upward journey and downward journey are the same
the upward journey takes more time
the downward journey takes more time
Can't be said
virtual and upright
virtual and inverted
real and inverted
real and upright
40 years
50 years
76 years
80 years
electromagnetic radiations
helium nuclei
negatively charged particles
neutral particles