Q1. What is the approximate height of a geostationary satellite from the surface of the Earth?
A 6000 km
B 63000 km
C 36000 km Correct
D 42000 km
Explanation
A geostationary satellite orbits above the equator at roughly 35,786 km from the Earth’s surface, usually rounded to 36,000 km in exams. At this height its orbital period matches the Earth’s rotation, so it appears fixed over one longitude. 6000 km is far too low for a geostationary orbit. 63000 km is much higher than the required orbit. 42000 km is close to the satellite’s distance from the Earth’s centre, not its height above the surface.