Topic: Communication Systems
The orbital period of a satellite in circular orbit of radius R from the centre of the earth, is proportional to
- A. $R^{1/2}$
- B. $R^{3/2}$
- C. $R^{2}$
- D. $R$
Answer: B. $R^{3/2}$
Explanation: According to Kepler's Third Law, the square of the orbital period ($T²$) is directly proportional to the cube of the orbital radius ($R³$). Therefore, $T \propto R^{3/2}$.