# 50+ Earth Satellite MCQs and Answers

Earth Satellite MCQs and Answers play important role in various entrance test so students can practice online Gravitation quiz to attempt these MCQ’s. Gravitation is one of the most difficult chapter to master in Physics. While solving this topic it becomes more complicated due to lengthy theory. So students often stuck at that point while writing exams like JEE, NEET etc. Students don’t know how to tackle the exam questions on Gravitation. Here you will get all the details regarding Gravity MCQs and answers. We already published the most important Questions and Answers on the Chapter Gravitation.

## Earth Satellite MCQs and Answers

a) 0.7

b) 1

c) 1.5

d) 3

#### 2. A satellite is revolving very close to a planet of density D. What is the time period of that satellite?

a) [3/(D*G)]1/2

b) [3/(D*G)]3/2

c) [3/(2*D*G)]1/2

d) [(3*G)/D]1/2

#### 3. A satellite orbits the earth at a height of R/5. What is its orbital speed?

a) [(2*G*M)/(R)]1/2

b) [(G*M)/(R)]1/2

c) [(G*M)/(7*R)]1/2

d) [(5*G*M)/(6*R)]1/2

a) True

b) False

a) 90 minutes

b) 180 minutes

c) 560 minutes

d) 720 minutes

#### 7. The satellites orbiting the earth, eventually fall to the earth when they are left unsupervised or unattended because _____

a) their power supply runs out

b) of viscous forces causing the speed of the satellite and hence height to gradually decrease

c) the laws of gravitation predict such a trajectory

d) of collisions with other satellites

a) True

b) False

a) 4:1

b) 8:1

c) 16:1

d) 64:1

#### 10. The time period of a satellite depends on _____

a) the mass of the satellite

b) radius of its orbit

c) both mass of satellite and radius of the orbit

d) neither mass of satellite nor radius of the orbit

#### 11. Consider two satellites A and B. Both move around the earth in the same orbit but the mass of B is twice that of the mass of A.

a) Orbital speeds of A and B are equal

b) The orbital speed of A is twice that of B

c) The orbital speed of B is twice that of A

d) The kinetic energy of both A and B are equal

a) 3:4

b) 4:3

c) 9:16

d) 16:9

a) pi/2

b) pi/4

c) pi/6

d) pi/8

#### 14. If a satellite is orbiting as close to the earth’s surface as possible _____

a) its speed is maximum

b) its speed is minimum

c) it’s kinetic energy will be minimum

d) it is not possible to quantify its kinetic energy

a) (r3*v/R)

b) (r2*v3/R)

c) (r3*v2/R)

d) (r*v2/R2)

#### 16. A satellite revolves around a planet of radius “Q”. If the angular velocity of the satellite is “w” and the radius of the orbit is “4nQ”, where “n” is an integer, what is the acceleration due to gravity on the surface of the planet?

a) (w2 x (nQ) 3/Q2)

b) 16 (w2 x (nQ) 3/Q2)

c) 64(w2 x (nQ) 3/Q2)

d) 32(w2 x (nQ) 3/Q21)

a) 6400 km

b) 3200 km

c) 9600 km

d) 4800 km