40. Periodic time of a satellite revolving above Earth’s surface at a height equal to R, radius of Earth, is [g is acceleration due to gravity at Earth’s surface]
(a) 2π√2R/ g (b) 4√2π√R/g
(c) 2π√R/ g (d) 8π√R/ g
Answer:b
(8)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (123)