Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Gravitation

Question:

The rotation period of an earth satellite close to the surface of the earth is 83 minutes. The time period of another earth satellite in an orbit at a distance of three earth radii from its surface will be

Options:

83 minutes

83 × $\sqrt{8}$ minutes

664 minutes

249 minutes

Correct Answer:

664 minutes

Explanation:

T2 = k R3 ; T2 = k(4R)3

$\frac{T'^2}{T^2}$ = 64, T' = 8T = 8 × 83 = 664min