Question

The time period of geostationary satellite is:
${\text{A}}{\text{. Zero}}$
${\text{B}}{\text{. 24h}}$
${\text{C}}{\text{. 12h}}$
${\text{D}}{\text{. 48h}}$

Answer 1

Hint: For answering this question we must know what is a geostationary satellite and how much time it takes to revolve around our earth.

Complete step-by-step answer:
A geostationary satellite is a geosynchronous orbiting satellite with an orbital period equal to the rotation period of the Earth. After each sidereal day, such a satellite returns to the same location in the sky and traces a path in the sky that is usually some sort of analemma.
A single geostationary satellite with about 40 percent of the surface of the earth is on a line of sight. Three such satellites, each separated by 120 degrees of longitude, can provide coverage of the entire earth, except for small circular regions centered at the north and south geographic poles. Using a directional antenna or usually a small dish we can access a geostationary satellite aimed at the spot in the sky where the satellite appears to hover. The key advantage of this type of satellite is that it is possible to target an earthbound directional antenna, and then leave it in place without further modification. Another advantage is that interference from surface-based sources, and from other satellites, is minimized because highly directional antennas can be used.
A geostationary satellite is an earth-orbiting satellite which is located at an altitude of almost 35,800 kilometres directly above the equator, which revolves in the same direction as the earth i.e. from west to east direction of the rotation. The time span of a geostationary satellite revolution around Earth is the same as the rotation of Earth around its own axis, i.e. 24 hours.
Hence, option B is the correct answer and as per this time period of geostationary satellite is 24 hours.

Note: A satellite is an object that orbits or circles around a bigger object in space. There are two types of satellites: natural like the moon orbiting the Earth or artificial like the Earth orbiting the International Space Station. This is an important fact and we must remember this.