- 1(current)
Q. No.If the sun and the planets carried huge amounts of opposite charges, then:
| a. | all three of Kepler’s laws would still be valid |
| b. | only the third law would be valid |
| c. | the second law would not change |
| d. | the first law would still be valid |
Which of the above statements is/are correct?
1. (a), (b), (c)
2. (a), (d)
3. (b), (c), (d)
4. (a), (c), (d)
Subtopic: Â Kepler's Laws |
 54%
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Given below are two statements:
| Assertion (A): | The angular velocity of a planet orbiting around the sun increases when it is nearest to the sun. |
| Reason (R): | Angular momentum of a body is proportional to angular velocity. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Â Kepler's Laws |
From NCERT
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Given below are two statements:
| Assertion (A): | The length of the day is slowly increasing. |
| Reason (R): | The dominant effect causing a slowdown in the rotation of the earth is the gravitational pull of other planets in the solar system. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Â Kepler's Laws |
From NCERT
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Given below are two statements:
| Assertion(A): | A planet moves faster when it is closer to the sun in its orbit and vice-versa. |
| Reason(R): | Orbital velocity in the orbit of the planet is constant. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Â Kepler's Laws |
 56%
From NCERT
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Given below are two statements:
| Assertion (A): | The comets do not obey Kepler's law of planetary motion. |
| Reason (R): | The comets do not have elliptical orbits. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Â Kepler's Laws |
From NCERT
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Given below are two statements:
| Assertion (A): | The square of the period of revolution of a planet is proportional to the cube of the semi-major axis of its elliptical orbit. |
| Reason (R): | Sun's gravitational field is inversely proportional to the square of its distance from the planet. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Â Kepler's Laws |
From NCERT
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Given below are two statements:
| Assertion (A): | The time period of the revolution of a satellite around a planet is directly proportional to the radius of the orbit of the satellite. |
| Reason (R): | Artificial satellites do not follow Kepler's law of planetary motion. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Â Kepler's Laws |
 67%
From NCERT
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Given below are two statements:
| Assertion (A): | Light from a distant quasar follows a curved path around a black hole. |
| Reason (R): | An object curves the space around it due to its mass. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Â Kepler's Laws |
 67%
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Given below are two statements:
| Assertion (A): | From a satellite orbiting around earth in a circular orbit, an object is fired in the forward direction. The orbit of the satellite becomes elliptical. |
| Reason (R): | When the speed of a satellite is slightly less or more than orbital speed, its orbit is elliptical. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Â Kepler's Laws |
 72%
From NCERT
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- 1(current)
Q. No.
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