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Assertion: The speed of revolution of an...

Assertion: The speed of revolution of an artificial satellite revoving very near the earth is `8kms^(-1)`.
Reason: Orbital velocity of a satellite, becomes independent of height of near satellite.

A

If both the assertion and reason are true and reason is a true explantion of the assertion.

B

If both the assertion and reason are true but the reason is not true the correct explantion of the assertion.

C

If the assertion is true but reason false

D

If both the assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
A
`v_(0)=R_(e)sqrt(g/(R_(e)+h))`
For satellite revolving very near to earth `R_(e)+h=R_(e)`
As `(h lt lt R)`
`v_(0)=sqrt(R_(e)g) ~=sqrt(64xx10^(5)xx10)=8xx10^(3)m//s=8kms^(-1)`
Which is independent of height of a satellite.
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