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Assertion : A planet moves faster, whe...

Assertion : A planet moves faster, when it is closer to the sun in its orbit and vice versa.
Reason : Orbital velocity in orbital of planet is constant.

A

If both assertion and reason are true and the reason is the correct explanation of the assertion.

B

If both assertion and reason are true but reason is not the correct explanation of the assertion.

C

If assertion is true but reason is false.

D

If the assertion and reason both are false.

Text Solution

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The correct Answer is:
C
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This section contains Assertion and Reason type questions. Each question has 4 choices (1), (2), (3) and (4), out of which only one is correct. 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 planet is constant.

In elliptical orbit of a planet

Assertion: The planet move slower when they are farther from the Sun than when they are nearer. Reason : Angular velocity of a planet is a constant quantity.

Orbit of a planet around a star is

Assertion : Angular speed of a planet around the sun increases, when it is closer to the sun. Reason : Total angular momentum of the system remains constant.

A planet is revolving around the Sun in an elliptical orbit. Its closest distance from the Sun is r and farthest distance is R . If the orbital velocity of the planet closest to the Sun is v , then what is the velocity at the farthest point?

ERRORLESS -GRAVITATION-Assertion and Reasons
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  4. Assertion : Orbital velocity of a satellite is greater than its esca...

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  5. Assertion: if an earth satellite moves to a lower orbit, there is some...

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  7. Assertion: The time period of geostationary satellite is 24 hrs. Rea...

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  8. Assertion : The principle of superposition is not valid for gravitat...

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  9. Assertion: Two different planets have same escape velocity. Reason:...

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  10. Assertion: The time period of revolution of a satellite close to surfa...

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  12. Assertion: Generally the path of projectile form the earth is paraboli...

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  13. Assertion: A body becomes weightless at the centre of earth. Reason:...

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  14. Statement-1: Space rockets are usually launched in the equatorial line...

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  15. Assertion : The binding energy of a satellite does not depend upon t...

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  16. Assertion : We can not move even a finger without disturbing all the s...

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  17. Assertion : If earth were a hollow sphere, gravitational field inten...

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  18. Assertion : For a satellite revolving very near to earth’s surface t...

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