Physics
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May 23, 2022
A flywheel has moment of inertia 4 kg-m2 and has kinetic energy of 200 J. Calculate the number of revolutions...
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May 23, 2022
A wheel of moment of inertia 10 kg-m2 is rotating at 10 rotations per minute. The work done in increasing...
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May 23, 2022
(a) Laws of motion (b) Laws of rotational motion (c) Laws of planetory motion (d) Laws of curvilinear motion Answer:...
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May 23, 2022
(a) 1/2 year (b) 2√2 years (c) 4 years (d) 8 years Answer: b (6)
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May 23, 2022
(a) 1 : 2 (b) 1 : 1 (c) 1 : 3 (d) None of these Answer: b (6)
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May 23, 2022
A satellite A of mass m is at a distance of r from the centre of the earth. Another satellite...
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May 23, 2022
(a) Conservation of energy (b) Conservation of linear momentum (c) Conservation of angular momentum (d) None of these Answer: c...
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May 23, 2022
(a) 8 times (b) 4 times...
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May 23, 2022
According to Kepler, the period of revolution of a planet (T) and its mean distance from the sun (r) are...
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May 23, 2022
(a) The orbital velocity depends on the mass of the satellite (b) A minimum velocity of 8 km/sec is required...
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May 23, 2022
(a) Greater than the orbital speed of earth (b) Less than the orbital speed of earth (c) Equal to the...
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May 23, 2022
(a) 1.38 cm (b) 3.5 cm (c) 1.75 cm (d) 2.45 cm Answer-b (42)
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May 23, 2022
(a) Energy (b) Angular momen (c) Linear momentum (d) None of these...
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May 23, 2022
(a) 1.25 years (b) 1.59 years (c) 0.89 years ...
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May 23, 2022
(a) 83 minutes (b) 83 × √8 minutes (c) 664 minutes (d) 249 minutes Answer:c (8)
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May 23, 2022
(a) -(1/2)Mv2 (b) (1/2)Mv2 (c) (3/2)Mv2 (d)...
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May 23, 2022
(a) 20 hours (b) 10 hours (c) 80 hours (d) 40 hours Answer: d (4)
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May 23, 2022
(a) T/R (b)...
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May 23, 2022
(a) Increase (b) Decrease (c) Unchanged (d) Nothing can be said Answer: b (11)
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May 23, 2022
(a) 6400 km (b) 4800 km (c) 32000 km ...
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May 23, 2022
(a) Zero (b) Equal to that on the earth (c) More than that on the earth (d) Less than that...
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May 23, 2022
(a) 2.00 mm (b) 4.00 mm (c) 6.00mm (d) 8.00 mm Answer-d (11)
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May 21, 2022
(a) Increases (b) Decreases (c) Becomes zero (d) Remains constant Answer-d (10)
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May 21, 2022
(a) The earth does not attract the objects in a satellite (b) The normal force by the chair on the...
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May 21, 2022
(a) Ml2/6 (b) Ml2/12 (c) Ml2/3 (d) Ml2/4 Ans. b (32)
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May 21, 2022
(a) ma2 (b) 3 ma2 (c) 3/4 ma2 (d) 2/3 ma2 Ans....
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May 21, 2022
(a) -(GMm/r) (b) GMm/r (c) ...
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May 21, 2022
(a) 1/2 lunar month (b) 2/3 lunar month (c) 2-3/2 lunar month ...
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May 21, 2022
(a) 3 v/2 (b) 4 v/2 (c) 6 v ...
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May 21, 2022
(a) Half the present year (b) One-eighth the present year (c) One-fourth the present year (d) One-sixth the present year...
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May 21, 2022
(a) It is heavier than other planets (b) It has higher density than other planets (c) It is closer to...