MCQOPTIONS
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MCQOPTIONS
This section includes 11 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
If the eccentricities of the planetary orbits were taken as zero, then the sun is at the centre of the orbit. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
The elliptical orbits of planets were indicated by calculations of the orbit of which astronomical body? |
| A. | Mercury |
| B. | Earth |
| C. | Earth s moon |
| D. | Mars |
| Answer» E. | |
| 3. |
Kepler s laws of planetary motion improved ______ |
| A. | the heliocentric theory |
| B. | the geocentric theory |
| C. | the big bang theory |
| D. | the string theory |
| Answer» B. the geocentric theory | |
| 4. |
What is the constant of proportionality in Kepler s law of periods known as? |
| A. | Universal gravitational constant |
| B. | Escape velocity |
| C. | There is no constant of proportionality |
| D. | Cannot be determined |
| Answer» D. Cannot be determined | |
| 5. |
The velocity of a planet is the greatest at perigee. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
The velocity of a planet is constant throughout its elliptical trajectory in an orbit. |
| A. | True |
| B. | False |
| Answer» C. | |
| 7. |
What is the time taken by a planet to sweep an area of 2 million square km if the time taken by the same planet to cover an area of 1 million square km is 36 hours? |
| A. | 18 hours |
| B. | 36 hours |
| C. | 72 hours |
| D. | 144 hours |
| Answer» D. 144 hours | |
| 8. |
What does Kepler s law of period relate? |
| A. | Time period and semi-minor axis |
| B. | Time period and eccentricity |
| C. | Time period and semi-major axis |
| D. | Time period and area swept by the planet |
| Answer» D. Time period and area swept by the planet | |
| 9. |
Kepler s laws of planetary motion were proposed only for _____ |
| A. | our sun |
| B. | any star in our galaxy |
| C. | any star in the universe |
| D. | stars of other solar systems |
| Answer» B. any star in our galaxy | |
| 10. |
Kepler s laws of planetary motion replaced circular orbits with _____ |
| A. | elliptical orbits |
| B. | parabolic orbits |
| C. | conical orbits |
| D. | hyperbolic orbits |
| Answer» B. parabolic orbits | |
| 11. |
From Kepler s law of orbit, we can infer that the sun is located _____ of the planet s orbit. |
| A. | at the centre |
| B. | at one of the foci |
| C. | at both foci |
| D. | anywhere along the semi-minor axis |
| Answer» C. at both foci | |