A satellite is revolving in a circular orbit at a height 'h' from the earth's surface (radius of earth R, h lt lt R). The minimum increases in its orbital velocity required, so that the satellite could escape from the earth's gravitational field, is close to : (Neglect the effect of atmosphere)

A satellite is revolving in a circular orbit at a height 'h' from the

1.	A satellite is revolving in a circular orbit at a height 'h' from the earth's surface (radius of earth R, h lt lt R). The minimum increases in its orbital velocity required, so that the satellite could escape from the earth's gravitational field, is close to : (Neglect the effect of atmosphere)
Answer» `SQRT(GR)( sqrt(2)-1)` `sqrt(2gR)` `sqrt(gR)` `sqrt(g(R )/(2))` ANSWER :A