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Physical Science |
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296)Which of the has equal periods od rotation and revolution? | |||
Mercury | Venus | ||
Moon | Uranus | ||
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297)Weight of a person can be zero when 1. he is falling freely 2. he is orbiting in a satellite 3. he is in an aeroplane flying at a high altitude 4. he is having ride in a gas balloon |
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1 and 3 | 1 and 2 | ||
1, 2 and 3 | all of them | ||
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298)Mountain roads wind up gradually and do not go up straight, because | |||
winding roads offer more friction making driving easier | it is easier to construct winding roads | ||
chances of accident is less in winding roads | on winding roads less force is required to overcome the gravity | ||
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299)For the same weight and same fuel supply, a multistage rocket is preferred over a single stage rocket, because | |||
it is easier to assemble a multistage rocket | it is cheaper to build a multistage rocket | ||
final velocity acheived in a multistage rocket is higher | final velocity acheived in a multistage rocket is lower | ||
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300)Consider the metals 1. Platinum 2. Gold 3. Copper 4. Lead Their correct order in the ascending order of density is |
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1, 2, 3, 4 | 2, 3, 4, 1 | ||
3, 4, 2, 1 | 4, 3, 2, 1 | ||
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301)The earth and the moon are about the same distance from the sun, yet on the average the earth is much warmer than the moon. Why? | |||
The moon has almost no atmosphere | The surface of the moon is darker | ||
Nights on the moon are much longer | The moon is much smaller than the earth | ||
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302)There is no Doppler effect for sound when | |||
the source produces a sound of very high frequency | the source of sound recedes from the observer | ||
the source of sound approaches the observer | the source of sound moves at right angle to the line joining the source and the observer | ||
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303)Match the following1. Force a. watt 2. Energy b. pascal 3. Power c. newton 4. Pressure d. Joule |
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1-a, 2-b, 3-c, 4-d | 1-c, 2-a, 3-d, 4-b | ||
1-c, 2-d, 3-a, 4-b | 1-b, 2-a, 3-d, 4-c | ||
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304)Consider the following electromagnetic waves 1. Ultraviolet 2. Microwaves 3. X-rays 4. Radio waves Their correct arrangement in the ascending order of wavelength is |
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1, 2, 3, 4 | 3, 1, 2, 4 | ||
4, 3, 2, 1 | 3, 2, 4, 1 | ||
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305)A star with a mass of less than 1.4 solar masses will probably end its life as a | |||
black hole | pulsar | ||
white dwarf | neutron star | ||
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306)Match the followingA. Mars 1. Titan B. Saturn 2. Miranda C. Uranus 3. Phobos D. Jupiter 4. Ganymede |
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A-3, B-1, C-2, D-4 | A-3, B-2, C-1, D-4 | ||
A-4, B-1, C-2, D-3 | A-2, B-1, C-3, D-4 | ||
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307)Rocks of which planet are likely to float on water? | |||
Mars | Saturn | ||
Jupiter | Venus | ||
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308)Among the moons of the planets, the largest is | |||
Callisto of Jupiter | Rhea of Sarurn | ||
Ganymede of Jupiter | Titan of Saturn | ||
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309)Which of the Jupiter's moons are larger than the planet Mercury? 1. IO 2. Ganymede 3. Europa 4. Callisto |
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1 and 2 | 2 and 3 | ||
3 and 4 | 2 and 4 | ||
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310)Which of the following is used as a libricant in heavy machines? | |||
Graphite | Bauxite | ||
Phosphorus | Sulphur | ||
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