Need and Importance of Space Mission

Q.

The ratio of kinetic energy of a planet at perigee and apogee during its motion around the sun in an elliptical orbit of eccentricity $e$is?

Q. Name the first man-made satellite ever launched into space.

1. EDUSAT
2. IRS
3. Sputnik $\text{I}$
4. Astrosat

Q. $\text{PSLV}$ stands for:

1. $\text{Polar Satellite Location Vehicle}$
2. $\text{Public Satellite Location Vehicle}$
3. $\text{Polar Satellite Launch Vehicle}$
4. $\text{Progressive Solar and Lunar}$ $\text{Vehicle}$

Q. Which of the following is/are the applications of satellites?

1. Weather forecasting
2. Ground-water detection
3. Remote sensing
4. Radio broadcasting

Q. A satellite revolving around a planet has orbital velocity $10km/s$. The additional velocity required for the satellite to escape to from the gravitational field of the planet is:

1. $14.14km/s$
2. $11.2km/s$
3. $4.14km/s$
4. $41.4km/s$

Q. Time period of revolution is T for any satellite revolving around a planet of radius R. The period of revolution for the satellite around another planet having the same density($\rho$) radius as 3R, is__. (Assume the satellite to be very near to the planet's surface)

1. T
2. 9 T
3. 3 T
4. $3\sqrt{3}T$

Q.

A space station is set up in a space at a distance equal to the earth's radius from the surface of the earth. Suppose a satellite can be launched from the space station. Let ${\nu }_1$ and ${\nu }_2$ be the escape velocities of the satellite on the earth's surface and space station, respectively. Then

1. ${\nu }_2={\nu }_1$
2. ${\nu }_2<{\nu }_1$
3. ${\nu }_2>{\nu }_1$
4. (a), (b) and (c) are valid depending on the mass of satellite.

Q. SITE stands for Satellite Instructional Television Experiment.

1. False
2. True

Q. In a satellite if the time of revolution is T, then its kinetic energy is proportional to

1. $\frac{1}{T}$
2. $\frac{1}{T^2}$
3. $\frac{1}{T^3}$
4. $T^{-\frac{2}{3}}$

Q. A satellite is moving with a constant speed '$V$' in a circular orbit about the earth. An object of mass '$m$' is ejected from the satellite such that it just escapes from the gravitational pull of the earth. At the time of its ejection, the kinetic energy of the object is

1. $\frac{1}{2}m{V}^2$
2. $m{V}^2$
3. $\frac{3}{2}m{V}^2$
4. $2m{V}^2$

Q.

An artificial satellite makes an integral number of revolutions around the earth in 24 hours.What type of satelliite is it?Write two practical applications of such satellites.