Gravitation — Important Questions
CBSE · Class 11 · Physics
155 important questions from Gravitation for CBSE Class 11 Physics, with answers. Includes multiple choice, multiple correct and text answer questions.
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Important Questions from Gravitation
What is the first of Kepler's laws of planetary motion?
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Planets move in elliptical orbits with the Sun at one focus
Kepler's first law states that planets move in elliptical orbits with the Sun located at one of the two foci of the ellipse, breaking away from the previous circular orbit model.
What happens to gravitational force as distance increases?
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Force decreases inversely with square of distance
According to Newton's Universal Law of Gravitation, gravitational force decreases inversely with the square of the distance between two objects.
What is the gravitational potential energy of two masses separated by distance r?
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-GMm/r
The gravitational potential energy between two masses is given by the formula -GMm/r, where G is the gravitational constant, M and m are the masses, and r is the distance between them.
What is the time period of a satellite very close to Earth's surface?
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85 minutes
For a satellite very close to Earth's surface, the time period is approximately 85 minutes, calculated using the formula 2πRE/g.
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
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