A satellite revolves around the earth in an elliptical orbit. Its… - Vidyadip

MCQ

A satellite revolves around the earth in an elliptical orbit. Its speed

A
Is the same at all points in the orbit
✓
Is greatest when it is closest to the earth
C
Is greatest when it is farthest from the earth
D
Goes on increasing or decreasing continuously depending upon the mass of the satellite

✓

Answer

Correct option: B.

Is greatest when it is closest to the earth

b
(b) Speed of satellite is greatest when it is closest to earth as near earth surface $r$

$\approx \mathrm{R}, \mathrm{V}_{0}=\sqrt{(\mathrm{GM} / \mathrm{r})}=7.9 \mathrm{kms}^{-1}$

This is maximum speed of satellite

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

NEET STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

The temperatures of two bodies $A$ and $B$ are respectively ${727^o}C$ and ${327^o}C$. The ratio ${H_A}:{H_B}$ of the rates of heat radiated by them is

A point charge of magnitude $+ 1\,\mu C$ is fixed at $(0, 0, 0) $. An isolated uncharged spherical conductor, is fixed with its center at $(4, 0, 0).$ The potential and the induced electric field at the centre of the sphere is

If ${I_1}$ and ${I_2}$ be the size of the images respectively for the two positions of lens in the displacement method, then the size of the object is given by

An electron, a proton and an alpha particle having the same kinetic energy are moving in circular orbits of radii $r_e,r_p$ and ${r_\alpha }$ respectively in a uniform magnetic field $B$. The relation between $r_e,r_p$ and $\;{r_\alpha }$ is

Two blocks of masses of $1\,kg$ and $5\,kg$ are attached to the ends of a massless string passing over a pulley of negligible weight. The pulley itself is attached to a spring balance as shown in figure. The blocks start moving, during this interval; the reading of spring balance will be

Two ideal electric dipoles $A$ and $B$ having their dipole moment $p_{1}$ and $p_{2}$ respectively are placed on a plane with their centres at $O$ as shown in the figure. At point $C$ on the axis of dipole $A$, the resultant electric field is making an angle of $37^{\circ}$ with the axis. The ratio of the dipole moment of $A$ and $B, \frac{P_{1}}{P_{2}}$ is $....$ (take $\left.\sin 37^{\circ}=\frac{3}{5}\right)$

A microwave of wavelength $2.0 \mathrm{~cm}$ falls normally on a slit of w1dth $4.0 \mathrm{~cm}$. The angular spread of the central maxima of the diffraction pattern obtained on a screen $1.5 \mathrm{~m}$ away from the slit, will be:

According to the kinetic theory of gases the $r.m.s.$ velocity of gas molecules is directly proportional to

A body of mass $'m'$ is launched up on a rough inclined plane making an angle of $30^{\circ}$ with the horizontal. The coeffcient of friction between the body and plane is $\frac{\sqrt{x}}{5}$ if the time of ascent is half of the time of descent. The value of $x$ is ..... .

If $\vec{u}$ is instantaneous velocity of particle and $\vec{v}$ is velocity of wave, then