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Assertion: If the radius of the earth's ...

Assertion: If the radius of the earth's orbit around the sun were twice its present value, the number of days in a year would be 1,032 days Reason: According to Kepler's law of periods. `T^2 prop r^3`

A

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

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

C

C. if assertion is true, but reason is false

D

D. if both assertion and reason are false

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MODERN PUBLICATION-Unit Test - Gravitation-Example
  1. Assertion: The comets do not obey Kepler's laws of planetary motion R...

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  2. Assertion: The square of the period of revolution of a planet is propo...

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  3. Assertion: If the radius of the earth's orbit around the sun were twic...

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  4. Assertion: The earth is slowing down and as a result the moon is comin...

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  5. Assertion: The length of the day is slowly increasing Reason: The dom...

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  6. Assertion: The mass of the earth in terms of g, Rand G is given by M=g...

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  7. The change in the value of g at a height h h lt lt R above the surface...

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  8. Assertion: A tennis ball bounces higher on hills than in plains Reason...

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  9. Assertion: Average density of the earth depends on the value of g Rea...

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  10. Assertion: The earth without its atmosphere would be inhospitably cold...

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  11. Assertion: The time period of an earth satellite in a circular orbit i...

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  12. Assertion: The geostationary satellites are launched, so as to revolve...

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  13. Assertion: The time-period of pendulum on a satellite orbiting the ear...

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  14. A planet of mass m moves around the sun of mass M in elliptical orbit....

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  15. The duration of day is highest in :

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  16. A ball is thrown upwards with a velocity of 100 ms^-1. It will reach t...

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  17. A ball is thrown upwards with a velocity of 19.6 ms^-1. The maximum he...

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  18. What would be the acceleration due to gravity at another planet, whose...

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  19. If a planet existed whose mass and radius were both half of that of th...

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  20. When the radius of earth is reduced by 1 % without changing the mass, ...

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