Moon and stars in sky - class-XI
| Description: moon and stars in sky | |
| Number of Questions: 90 | |
| Created by: Vinaya Modi | |
| Tags: evs physics sunita in space gravitation: planets and satellites gravitational fields artificial satellite gravitation search of life outside earth |
LANDSAT series of satellite move in near polar orbits at an altitude of
Which one of the following statements is correct?
Out of the following, the only correct statement about satellites is
State whether the given statement is True or False :
The time period of an orbiting satellite is (assuming spherical earth)
A satellite is orbiting around the earth in an orbit in equatorial plane, of radius 2$R _{e}$ , where $R _{e}$ is theradius of the earth. Find the area on the earth, this satellite covers for communication purpose in its complete revolution
Identify the correct full form of IRNSS from the following
For a satellite to be geostationary, which of the following are not essential conditions?
To have an earth synchronous satellites it should be launched at the proper height moving from
The time period of geostationary satellite is :
The period of rotation of the geostationary satellite is ______ hours.
Two stones are projected with the same speed but making different angles with horizontal. Their ranges are equal. If the ranges of projection of one is $\pi/3$ and its maximum height is ${h} _{1}$ then the maximum height of the other will be
The orbital angular velocity vector of a geostationary satellite and the spin angular velocity vector of the earth are
A synchronous satellite should be at a proper height moving
The orbital period of revolution of an artificial satellite revolving in a geostationary orbit is ...
Communication satellites are also referred to as:
What are the general uses of satellite?
A satellite placed in an orbit around Earth with certain speed will revolve in_______ as seen from Earth
Moon can be classified as a
It is possible to put an artificial satellite into orbit in such a way that it will always remain directly over New Delhi.
Parking orbit for a geostationary satellite is
A geostationary satellite is at rest, relative to earth only for points in the
The speed of a geostationary satellite relative to a person on the earth is
Time period of a simple pendulum inside a satellite orbiting earth is
Two satellites of masses $m _{1}$ and $m _{2} (m _{1} > m _{2})$ are revolving round the earth in circular orbits of radii $r _{1}$ and $r _{2}(r _{1} > r _{2})$ respectively. Which of the following statements is true regarding their speeds $v _{1}$ and $v _{2}$?
An artificial satellite is moving around earth in a circular orbit with speed equal to one fourth the escape speed of a body from the surface of earth. The height of satellite above earth is : ($R$ is radius of earth)
A stationary object is released from a point $P$ at a distance $3R$ from the centre of the moon which has radius $R$ and mass $M$. Which of the following gives the speed of the object on hitting the moon?
Suppose that the moon travels in a circle about the earth at a distance $ 3.84 \times 10^8 m$ once in every 28.3 days and that has a mass of $7.4 \times 10^{22}$ . Then the speed of the moon is most nearly:
An earth satellite X is revolving around earth in an orbit whose radius is one- fourth the radius of orbit of a communication satallite. Time period of revolution of X is
The time period of a geostationary satellite at a height $36000\ km$, is $24\ h$. A spy satellite orbits very close to earth surface ($R=6400\ km$). What will be its time period ?
Satellite is revolving around the earth. If it's radius of orbit is increased to $4$ times the radius of geostationary satellite, what will become its time period ?
The distance between the centre of the earth and moon is 384000 km. If the mass of the earth is $6 \times 10^{24} kg$ and $G=6.66\times 10^{-11}$ units,the speed of the moon is nearly
A satellite orbiting close to the earth's surface will escape if
A particle is projected with a velocity $\sqrt{\dfrac{4gR}{3}}$ vertically upward from the surface of the earth. R is the radius of the earth & g being the acceleration due to gravity on the surface of the earth. The velocity of the particle when it is at half the maximum height reached by it is:
The relay satellite transmits the television programme continuously from one part to another because its :
If mass of earth is $5.98\times 10^{24}$ kg and earth moon distance is $3.8\times 10^5$ km, the orbital period of moon, in days is
If the angular velocity of a planet about its own axis is halved, the distance of geostationary satellite of this planet from the cent of the planet will become :
A satellite has to revolve round the earth in a circular orbit of radius 8 x $10^3$km. The velocity of projection of the satellite in this orbit will be -
Select the correct statement from the following
The total energy of a satellite is-
Two identical satellites are at distance R and 7R from the surface of the earth of radius R. Which is the wrong statement from the following ?
A geostationary satellite is orbiting the earth at a height of 6R above the surface of the earth R being the radius of the earth. What will be the time period of Another satellite at a height 2.5 R from the surface of the earth?
Which of the following is true ?
At what height above the earth's surface does the value of g becomes 36% of the value at the surface of earth ?
What is the nature of relation betweenthe kinetic energy $\left( \mathrm { E } _ { \mathrm { k } } \right)$ and their orbitalradius $( \mathrm { r } )$ of the satellites revolvingaround the Earth?
An object weighs 10$\mathrm { N }$ at the north pole of the Earth. In a geostationary satelite at a distance of 7R from the centre of the Earth (of radius $\mathrm { R } )$ , the true weight and the apparent weight are respectively.-
Two artificial satellite of masses $ m _1 $ and $ m _2 $ are moving with speed $ v _1 $ and $ v _2 $ in orbits of radii$ r _1 $ and $ r _2 $ respectively. if $ r _ 1>r _2 $ then which of the following statements in true:-
A particle is projected upward from the surface of earth (radius $= R$ ) with a speed equal to the orbital speed of a satellite near the earth's surface. The height to which it would rise is
For a satellite to be geostationary, which of the following are essential conditions?
Orbital decay, a process of prolonged reduction in the attitude of a satellites orbit is caused by
A) Atmospheric drag B) Gravitational Pull C) Tides
If the length of the day is $T$ , the height of that TV satellite above the earth's surface which always appears stationary from earth, will be:
A planet of small mass m moves around the sun of mass M along an elliptical orbit such that its minimum and maximum distance from the sun are r and R respectively. Its period of revolution will be:
A geostationary satellite orbits around the earth in a circular orbit of radius $36000 km$. Then, the time period of a spy satellite orbiting a few $100 km$ above the earth's surface $\displaystyle { R } _{ earth }={ 6400 } \quad km$ will approximately be
A space shuttle is revolving around the earth in circular orbit. A certain point pilot fires forward pointing thruster to decrease shuttle's mechanical energy. Then orbital time period $T$ of shuttle
Geo-stationary satellite is one which
The relay satellite transmits the $TV$ programmed continuously from one part of the world to another because its
For a geostationary satellite orbiting around the earth identify the necessary condition
A satellite is seen every $6$ hours over the equator. It is known that it rotates opposite to that of earth's direction. Then the angular velocity (in radian per hour) of satellite about the centre of earth will be :
Geostationary satellite
The distance of a geostationary satellite from the centre of earth (radius R = 6400 Km) is nearly.
A satellite launching station should be
A communication satellite of earth which takes $24 hr$. to complete one circular orbit eventually has to be replaced by another satellite of double mass. If the new satellites also has an orbital time period of $24 hrs$, then what is the ratio of the radius of the new orbit to the original orbit ?
The minimum number of satellites needed to be placed for world-wide communication between any two locations on earth's surface is:
A body is dropped by a satellite in its geo -stationary orbit.
The earth satellite can move in an orbit the plane of which coincides with.
If $R$ is the average radius of earth, $\omega $ is its angular velocity about its axis and $g$ is the gravitational acceleration on the surface of earth then the cube of the radius of orbit of a geostationary satellite will be equal to.
Motion of artificial earth satellites around the earth is powered by
The moon waxes and wanes while going around the earth and hence it has circular motion
Height of geostationary satellite is
Two planets, $X$ and $Y$, revolving in a orbit around star. Planet $X$ moves in an elliptical orbit whose semi-major axis has length $a$. Planet $Y$ moves in an elliptical orbit whose semi-major axis has a length of $9a$. If planet $X$ orbits with a period $T$, Find out the period of planet $Y$'s orbit?
An object is released from rest at a distance of ${2r} _{e}$ from the center of the Earth, where ${r} _{e}$ is the radius of the Earth. Find out the velocity of the object when it hits the Earth in terms of the gravitational constant $\left(G\right)$, the mass of the Earth $\left(M\right)$, and ${r} _{e}$.
A geosynchronous orbit is one in which the satellite makes one revolution around the Earth in 24 hrs.
How far above the surface of the Earth does this satellite have to orbit?
Assume the radius of the Earth is $6.37 \times {10}^{6} m$, and the mass of the Earth is $5.98 \times {10}^{24} kg$.
Imagine a geostationary satellite of earth which is used as an inter continental telecast station. At what height will it have to be established?
Which of the followings are correct uses of satellite placed in an orbit around Earth?
For a satellite to be geostationary, which of the following are essential conditions?
Given that the universal gravitational constant, $G = 6.7 10^{-11} Nm^{2} kg^{-2}$ and that the mass,
M of the earth is $6.0 10^{24} kg$, find the speed of a satellite that is fixed to permanently
focus on the city of Abuja for broadcast of the 2010 IJSO competition.
For geo stationary satelites,
A geo-stationary satellite orbits around the earth in a circular orbit of radius $36000\ km$. Then, the time period of a spy satellite orbiting a few $100\ km$ above the earth's surface ($R _{earth}=6400\ km$) will approximately be -
A geostationary orbit will appear to move in
The mean radius of the earth is R, and its angular speed on its axis is $\omega $. What will be the radius of orbit of a geostationary satellite?
An instrument package is released from an orbiting earth satellite by simply detaching it from the outer. The package will :
A geostationary satellite is orbiting the earth at a height of $6R$ above the surface of the earth, where R is the radius of the earth. The time period of another satellite at a height of $2.5R$ from the surface of the earth is $\underline{\hspace{0.5in}}$ hours.
Statement 1: Geostationary satellites may be setup in equatorial plane in orbits of any radius more than earth's radius.
Statement 2: Geostationary satellites have period of revolution of 24 hrs.
A geostationary satellite has an orbital speed of
A satellite revolves from east to west in a circular equatorial orbit of radius $R=1.00\times10^4:km$ around the Earth. Find the velocity ($v'$) of the satellite in the reference frame fixed to the Earth.
The orbital velocity of an artificial satellite in a circular orbit very close to Earth is $v$. The velocity of a geosynchronous satellite orbiting in a circular orbit at an altitude of $6R$ from Earth's surface will be
If the length of the day is $T$, the height of that TV satellite above the earth's surface which always appears stationary from earth, will be.
A geostationary satellite is revolving at a height $6R$ above the earth's surface, where $R$ is the radius of earth. The period of revolution of satellite orbiting at a height $2.5R$ above the earth's surface will be.