Question

Out of following, the only correct statement about satellites is ____________.

Options

• A satellite cannot move in a stable orbit in a plane passing through the earth's centre

• Geostationary satellites are launched in the equatorial plane

• We can use just one geostationary satellite for global communication around the globe

• The speed of satellite increases with an increase in the radius of its orbit

Answer 1

Out of following, the only correct statement about satellites is Geostationary satellites are launched in the equatorial plane.

Explanation:

`"Orbital speed, v"_0 = sqrt("GM"/"r")`; so speed of satellite decreases with the increase in the radius of its orbit. We need more than one satellite for global communication. For stable orbit it must pass through the centre of earth. So only (B) is correct.