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Gen. Science |
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| 102)Planet is a | |||
| luminous body with its own light | non luminous body that does not have its own light | ||
| luminous body that twinkle | none of these | ||
| Answer : | |||
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| 103)A small hole in the window forms an inverted image on the opposite wall due to | |||
| the fact that light suffer lateral inversion on entering the hole | the hole acts as a convex lens | ||
| the rectilinear propagation of light | the hole acts as a prism | ||
| Answer : | |||
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| 104)A solar eclipse occurs when | |||
| the moon comes in between the sum and the earth | the sun comes in between the moon and the earth | ||
| the earth comes in between the sun and the moon | none of these | ||
| Answer : | |||
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| 105)A lunar eclipse occurs when | |||
| the moon comes in between the sum and the earth | the sun comes in between the moon and the earth | ||
| the earth comes in between the sun and the moon | none of these | ||
| Answer : | |||
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| 106)During the total solar eclipse which part is visible? | |||
| no part | corona | ||
| chromosphere | photosphere | ||
| Answer : | |||
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| 107)The image of an object formed by plane mirror | |||
| can be obtained on a screen | is virtual | ||
| is inverted | shorter than the object | ||
| Answer : | |||
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| 108)The minimum length of a plane mirror where one can see his full image is | |||
| one fourth of the height of the person | half of the height of the person | ||
| equal to the height of the person | more than the height of the person | ||
| Answer : | |||
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| 109)If one approaches a plane mirror at the speed of 15cm/s than his image will be approaching him at speed of | |||
| 15cm/s | 20cm/s | ||
| 30cm/s | 25cm/s | ||
| Answer : | |||
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| 110)Which one of the following mirrors is suitable to obtain real image of an object? | |||
| plane mirror | concave mirror | ||
| convex mirror | no mirror can produce real image | ||
| Answer : | |||
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| 111)Which one of the following can be used as burning glass? | |||
| plane mirror | concave mirror | ||
| convex mirror | concave lens | ||
| Answer : | |||
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| 112)The dentist\'s mirror is a | |||
| concave mirror | convex mirror | ||
| plane mirror | none of these | ||
| Answer : | |||
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| 113)For the rear view, motorists use | |||
| concave mirror | convex mirror | ||
| plane mirror | none of these | ||
| Answer : | |||
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| 114)The first evidence of the \'Big - Bang\' theory was given by | |||
| Albert Einstein | Edward Hubble | ||
| Stephen Hawking | S.N Bose | ||
| Answer : | |||
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| 115)The gas produced during lightning is | |||
| Nitrous Oxide | Nitric Oxide | ||
| Oxygen | Nitrogen Dioxide | ||
| Answer : | |||
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| 116)Electron was discovered by | |||
| Delton | Bohr | ||
| Rutherford | J. J. Thomson | ||
| Answer : | |||
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