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The radii of circular orbits of two satellites A and B of the earth, are 4R and R respectively. If the speed of satellite A is 3 V, then the speed of satellite B will be
Options
(a) 3 V / 4
(b) 6 V
(c) 12 V
(d) 3 V / 2
Correct Answer:
6 V
Explanation:
Orbital velocity of a satellite in a circular orbit of radius a is given by
v = √(GM / a) ⇒ v α √(1/a) ⇒ v₂ / v₁ = √(a₁ / a₂)
v₂ = v₁ √(4R / R) = 2 v₁ = 6 V
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Topics: Gravitation
(63)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A bullet of mass 0.05 kg moving with a speed of 80 m/s enters a wooden
- Which one of the following is not a unit of young’s modulus?
- A 50 ohm galvanometer gets full scale deflection when a current of 0.01 A passes
- Ionization potential of hydrogen atom is 13.6 eV. Hydrogen atoms in the ground state
- Two waves of same amplitude superpose. The resultant intensity is I₁
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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