Question

For a geostationary satellite orbiting around the earth identify the necessary condition

• A. it must lie in the equatorial plane of earth
• B. its height from the surface of earth must be $36000km$
• C. it period of revolution must be $2\pi \sqrt{\frac{R}{g}}$ where R is the radius of earth
• D. its period of revolution must be $24hrs$

Answer 1

Answer: (A), (B), (D)

The correct options are
A it must lie in the equatorial plane of earth
B its height from the surface of earth must be $36000km$
D its period of revolution must be $24hrs$

A geostationary satellite must satisfy the following requirements:

$1$. Its orbit must lie on an equatorial plane.

$2$. It must appear stationary when viewed from a point on earth which means its time period of revolution is $24hrs$.

$3$. Its height above the surface of the earth must be $36000km$.

So options A, B and D are correct.