Question

The velocity required to stay in orbit is ________

(a) constant

(b) infinite

(c) lower close to the earth than far from the earth

(d) higher close to the earth than far from the earth

This question was posed to me in unit test.

This intriguing question originated from Phase Comparator in section Phase Locked Loop & Pulse Modulation of Analog Communications

Answer 1

The correct choice is (d) higher close to the earth than far from the earth

Explanation: The velocity in orbit must be higher close to the earth than far from the earth. Then only components can stay in orbit.