A) \[{{V}_{rms}}<<{{v}_{e}}\]
B) \[{{V}_{rms}}>{{v}_{e}}\]
C) the mass and density of planet is less
D) \[{{V}_{rms}}=0\]
Correct Answer: A
Solution :
If the rms velocity of atmospheric particles on a planet is more than the escape velocity from that planet, then all atmospheric particles excape from that planet, then all atmospheric particles escape from planet and there is no atmosphere. Therefore, presence of atmosphere means\[{{V}_{rms}}<<{{v}_{e}}\]
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