2. | It is easier to roll a stone up a sloping road than to lift it vertical upwards because | |||||||
Answer: Option D |
3. | The absorption of ink by blotting paper involves | |||||||
Answer: Option B |
4. | Siphon will fail to work if | |||||||
Answer: Option B |
5. | Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to | |||||||
Answer: Option C |
6. | Nuclear sizes are expressed in a unit named | |||||||
Answer: Option A Explanation: Fermi – A unit of length equal to 10-15 meter (one femtometer), used in nuclear physics. It is similar to the diameter of a proton. |
7. | Light year is a unit of | |||||||
Answer: Option B |
8. | Mirage is due to | |||||||
Answer: Option A |
9. | Light from the Sun reaches us in nearly | |||||||
Answer: Option C |
10. | Stars appears to move from east to west because | |||||||
Answer: Option B |
11. | Pa(Pascal) is the unit for | |||||||
Answer: Option B |
12. | Planets do not twinkle because | |||||||
Answer: Option D |
13. | Metals are good conductors of electricity because | |||||||
Answer: Option A |
14. | Let a thin capillary tube be replaced with another tube of insufficient length then, we find water | |||||||
Answer: Option B |
15. | Out of the following pairs, choose the pair in which the physical quantities do not have identical dimension? | |||||||
Answer: Option C |
16. | If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same | |||||||
Answer: Option B |
17. | Pick out the scalar quantity | |||||||
Answer: Option B |
18. | Rectifiers are used to convert | |||||||
Answer: Option B |
19. | out of the following, which is not emitted by radioactive substance? | |||||||
Answer: Option D |
20. | Sound waves in air are | |||||||
Answer: Option B |
21. | Magnetism at the centre of a bar magnet is | |||||||
Answer: Option C |
22. | It is more difficult to walk on a sandy road than on a concrete road because | |||||||
Answer: Option B |
23. | Find the maximum velocity for the overturn of a car moving on a circular track of radius 100 m. The co-efficient of friction between the road and tyre is 0.2 | |||||||
Answer: Option D |
24. | Of the following properties of a wave, the one that is independent of the other is its | |||||||
Answer: Option A |
25. | Lux is the SI unit of | |||||||
Answer: Option A |
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