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which is the vector quantity?

work done in both is same but the rate of doing work is less in rolling
Angular momentum
time
heat


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Radiocarbon dating technique is used to estimate the age of

Rocks
Soil
Monuments
None of the above


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Mirage is the result of

equal heating of different parts of the atmosphere
magnetic disturbances in the atmosphere
depletion of ozone layer in the atmosphere
unequal heating of different parts of the atmosphere


A mirage is a naturally occurring optical phenomenon in which light rays are bent to produce a displaced image of distant objects or the sky.

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Light from sun reaches us in approx

2 minutes
4 minutes
6 minutes
8 minutes


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Metals are good conductors of electricity because

they contain free electrons
the atoms are lightly packed
both A & B
None of the above


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In which of the following pair, the physical quantities do not have identical dimension?

Force and rate of change of linear momentum
Impulse and moment of force
Pressure and Young''s modules
Planck''s constant and Angular momentum


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Point X is at a lower electrical potential than point Y. An electron between them on the line joining them will

remain at rest
move at right angles
move towards A
move towards B


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When flying aeroplane at a high altitude

the pressure remains same
the pressure decreases
normal atmospheric pressure is maintained
normal humidity is maintained


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Light travels at the fastest speed in

water
glass
vacuum
gas


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Optical fibre works on the

interference
scattering
total internal reflection
principle of refraction


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