Question

Geostationary satellite revolves at
(A). Any height
(B). Fixed height
(C). Height above pole
(D). The height which depends upon its mass

Answer 1

Hint: A satellite is any object that revolves around a planet. Moon is a great example of a satellite, the moon revolves around the earth while the earth is itself revolving around the sun. Moon is a natural satellite, there are also many more man-made satellites in space. These man-made satellites are used to capture images of the surface of the earth, as a medium for communication and many other purposes.

Complete step-by-step answer:
A geostationary satellite is a special kind of satellite. You must have noticed that the moon changes its position every day, sometimes it is directly on top of your head, on other occasions, it is to the side. But geostationary satellites have a fixed position relative to the earth. Geostationary satellites revolve around the same rate at which the earth rotates around its axis. This means if a geo-satellite is directly above your head, it will always remain there.
The geo-stationary satellites are present at a fixed altitude of 36,000 km. The launch of a geo-satellite is done in such a manner that the satellite remains relatively fixed with reference to earth. The time period of a geostationary satellite is 24 hours.
Hence, option B is the correct choice.

Note: As to why we need geo-satellites in the first place, one example can be television services at our homes. You all must have seen or used television services that require a signal receiving dish to be installed on your roof. The technician while installing it configures it in the direction of the geostationary satellite, if the relative position of the geo-satellite was not fixed, then this process would become impossible and the signal quality would drop.