MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The time period of a satellite of earth is 90 minutes. If the separation between the earth and the satellite is quadrupled, the new time period will be _____________ |
| A. | 90 minutes |
| B. | 180 minutes |
| C. | 560 minutes |
| D. | 720 minutes |
| Answer» E. | |
| 2. |
A satellite of mass “m” revolves around a planet at a height as shown in the figure. If “g” is the acceleration due to gravity on the surface of the planet, what is the orbital velocity of the satellite? |
| A. | gh/2 |
| B. | (gR)/(R-h) |
| C. | (gR2)/(R+h) |
| D. | [(gR2)/(R+h)]1/2 |
| Answer» E. | |
| 3. |
The time period of a satellite is independent of the mass of the satellite. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
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 |
| Answer» E. | |
| 5. |
The orbital velocity of a satellite orbiting a planet of mass “M” and radius “R” at a height as shown is [(G*M)/(R+h)]. |
| A. | True |
| B. | False |
| Answer» C. | |
| 6. |
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 |
| Answer» D. [(3*G)/D]1/2 | |
| 7. |
A satellite is launched into a circular orbit of radius R while a second satellite is launched into an orbit of radius 1.02R. What is the percentage change in the time periods of the two satellites? |
| A. | 0.7 |
| B. | 1 |
| C. | 1.5 |
| D. | 3 |
| Answer» E. | |
| 8. |
Consider 2 satellites A and B having time periods 16 hours and 1 hour, respectively. What is the ratio of the radius of their orbits? |
| A. | 4:1 |
| B. | 8:1 |
| C. | 16:1 |
| D. | 64:1 |
| Answer» E. | |
| 9. |
The time period of the moon around the earth is 24 hours. |
| A. | True |
| B. | False |
| Answer» C. | |
| 10. |
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 |
| Answer» C. the laws of gravitation predict such a trajectory | |