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A satellite is revolving in a circular orbit at a height \( h \) from the Earth's surface (radius of earth \( R, hR \) ). The
P minimum increase in its orbital velocity required, so that the satellite could escape from the Earth's gravitational field, is
W close to (Neglect the effect of atmosphere) \( \quad \) (2016 Main)
(a) \( \sqrt{2 g R} \)
(b) \( \sqrt{g R} \)
(c) \( \sqrt{g R / 2} \)
(d) \( \sqrt{g R}(\sqrt{2}-1) \)
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