Home
Class 11
PHYSICS
A geo-stationary stellite orbits around ...

A geo-stationary stellite orbits around the earth in a circular orbit of radius 36,000km. Then, the time period of a spy stellite orbitting a few hundred km above the earth's surface `(R_(earth) = 6400km)` will approximately be

A

`1/2 h`

B

`1 h`

C

`2 h`

D

`4h`

Text Solution

Verified by Experts

The correct Answer is:
`C`
Accroding to Kepler's law `T^(2) propR^(3)`
`:. ((T_(2))/(T_(1)))^(2)=((R_(2))/(R_(1)))^(3)`
Let the time period at earth's surface `=T_(1)`
For geo-stationary satellite,`T_(2)=24` hour,
`R_(2)=36,000 km`
For spy satellite, `T_(1)=? R_(1)~~6400 km`
`:. (24/(T_(1)))^(2)=(36000/6400)^(3)` or `T_(1)=24/13.34=1.8 h`
Promotional Banner

Similar Questions

Explore conceptually related problems

A geostationary satellite orbites around the earth in a circular orbit of radius 36000 km Then, the time period of a spy satellite orbiting a few hundred km above the earths surface (R_(e)=6400km) will approximately be

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 frw hundred km (600 km) above the earth's surface (R=6400 km) will approximately be

A geostationary satellite orbits around the earth in a circular orbit of radius 3600 km . Then the time period of satellite orbiting = 2600 km above the earth's surface (R_(earth) = 6400 km) will appoximetely be

A satellite has to revolve round the earth in a circular orbit of radius 8 xx 10^(3) km. The velocity of projection of the satellite in this orbit will be -

The time period of an earth stellite in circuarl orbit is independet fo

An artificial satellite is revolving around the earth in a circular orbit. Its velocity is one-third of the escape velocity. Its height from the earth's surface is (in km )

Satellite revolving around the earth at a height of 400 Km above the earth's surface has a time period of about

For a stellite orbiting close to the surface of earth the period of revolution is 84 min . The time period of another satellite orbiting at a geight three times the radius of earth from its surface will be

An artificial satellite revolves around the earth in circular orbit of radius r with time period T . The satellite is made to stop in the orbit which makes it fall onto the earth. Time of fall of the satellite onto the earth is given by