1. Tardigrade
  2. Question
  3. Physics
  4. A geostationary satellite orbits around the earth in a circular orbit of radius 36,000 km. Then, the time period of a spy satellite orbiting a few hundred km above the earth's surface (R e = 6400 km) will approximately be

Q. A geostationary satellite orbits around the earth in a circular orbit of radius . Then, the time period of a spy satellite orbiting a few hundred km above the earth's surface will approximately be

 3780  204 IIT JEEIIT JEE 2002Gravitation Report Error

Solution:

Time period of a satellite very close to earth's surface is 84.6 min. Time period increases as the distance of the satellite from the surface of earth increases. So, time period of spy satellite orbiting a few 100 km above the earth's surface should be slightly greater than 84.6 min. Therefore, the most appropriate option is (c)or 2 h.