General Knowledge - Physics
Exercise :: Physics - Section 1
| 73. |
One nanometer is equal to |
Answer: Option C
Explanation:
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| 74. |
Mica is used in electrical appliances such as electric iron because mica is |
| A. |
a good conductor of heat but a bad conductor of electricity | | B. |
a bad conductor of heat but a good conductor of electricity | | C. |
a good conductor of heat as well as electricity | | D. |
a bad conductor of heat as well as electricity |
Answer: Option A
Explanation:
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| 75. |
It is easier to roll a barrel full of coal tar than to pull it because |
| A. |
the full weight of the barrel comes into play when it is pulled | | B. |
the rolling friction is much less than the sliding friction | | C. |
more surface area of the barrel is in contact with the road when it is pulled | | D. |
coal tar is a liquid and it flows in the barrel when it is rolled |
Answer: Option B
Explanation:
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| 76. |
Minimum number of unequal vectors which can give zero resultant are |
Answer: Option B
Explanation:
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| 77. |
Intensity of sound has |
| A. |
an object existence | | B. |
a subject existence | | C. |
no existence | | D. |
both subjective and objective existence |
Answer: Option A
Explanation:
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| 78. |
Rain is falling vertically downwards. To a man running east-wards, the rain will appear to be coming from |
Answer: Option A
Explanation:
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