A) \[({{v}_{R}}>{{v}_{I}})\]
B) \[({{v}_{R}}<{{v}_{I}})\]
C) \[{{v}_{R}}={{v}_{I}})\]
D) No relation
Correct Answer: A
Solution :
Orbital velocity of a satellite is given by \[{{v}_{o}}=\sqrt{\frac{G{{M}_{e}}}{r}}\] where G= gravitational constant. \[{{M}_{e}}=\] mass of the earth r = distance of the satellite from the centre of the earth \[\therefore \] \[{{v}_{o}}\propto \frac{1}{\sqrt{r}}\] As the distance of INSAT-B from the centre of the earth is greater than the distance of Rohini from the centre of the earth \[\therefore \] \[{{v}_{R}}>{{v}_{I}}\]
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