72 questions across 1 question group — pick any mix to generate a Physics paper with step-by-step answer keys.
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
A double star is a system of two stars rotating about their centre of mass only under their mutual gravitational attraction. Let the star have mass m and 2m and their separation be l. Their time period of rotation about their centre of mass will be proportional to
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(a) |
(b) l |
(c) |
(d) |
A planet which is born sister of earth is
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(a) Mercury |
(b) Venus |
(c) Mars |
(d) Jupiter |
Mass of earth has been determined through
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(a) Use of Kepler's |
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(b) Sampling the density of earth's crust and using R |
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(c) Cavendish's determination of G and using R and 'g' at the surface |
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(d) Use of periods of satellites at different heights above earth's surface |
A planet of mass M has a satellite of mass m, revolving around the planet in a circular orbit of radius r and time period T. The mass (M) of the planet is
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(a) |
(b) |
(c) |
(d) |
Which of the planet is brightest
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(a) Mercury |
(b) Venus |
(c) Mars |
(d) Jupiter |
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