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- Question 1 of 34
1. Question
The period of revolution of a geostationary satellite is
- Question 2 of 34
2. Question
A piece of paper and a cricket ball are dropped from the same height. Under which of the following conditions do both reach the surface simultaneously?
- Question 3 of 34
3. Question
A rocket works on the principle of conservation of
- Question 4 of 34
4. Question
The frequency of ultrasound wave is typically
- Question 5 of 34
5. Question
Optical fibres are based on the phenomenon of
- Question 6 of 34
6. Question
‘Mirage’ is an example of
- Question 7 of 34
7. Question
The phenomenon of light associated with the appear-ance of blue colour of the sky is
- Question 8 of 34
8. Question
The time period of a pendulum when taken to the Moon would :
- Question 9 of 34
9. Question
The atmospheric air is held to the Earth by:
- Question 10 of 34
10. Question
The function of ball bearings in a wheel is :
- Question 11 of 34
11. Question
‘Shock-absorbers’ are usually made of steel as it:
- Question 12 of 34
12. Question
Which of the following could be used as fuel in propellant or rockets?
- Question 13 of 34
13. Question
Lambert’s law is related to
- Question 14 of 34
14. Question
One can distinguish a telescope from a microscope by observing
- Question 15 of 34
15. Question
The sound produced by a bat is-
- Question 16 of 34
16. Question
When a bar magnet is cut into two equal halves, the pole strength of each piece –
- Question 17 of 34
17. Question
Electrostatic precipitator is used to control –
- Question 18 of 34
18. Question
The time period of a seconds pendulum is
- Question 19 of 34
19. Question
Lakes freeze in cold countries in winter, leaving the water underneath at
- Question 20 of 34
20. Question
Which one of the following determines the sharpness of image in a camera? ,
- Question 21 of 34
21. Question
For a person having hyper -metropia, the near point is
- Question 22 of 34
22. Question
Amount of water vapour in the atmosphere is measured in terms of
- Question 23 of 34
23. Question
Name the process of production of energy in the Sun
- Question 24 of 34
24. Question
A spherical ball made of steel when dropped in mercury container will
- Question 25 of 34
25. Question
The sounds having a frequency of 20 Hertz to 20,000 Hertz are known as
- Question 26 of 34
26. Question
Eclipses occur due to which optical phenomena?
- Question 27 of 34
27. Question
Pure water is bad conductor of electricity because it is
- Question 28 of 34
28. Question
Gamma rays have greatest similarity with-
- Question 29 of 34
29. Question
The filament of electric bulb is made up of:
- Question 30 of 34
30. Question
When a vibrating tuning fork is placed on a table, a loud sound is heard. This is due to :
- Question 31 of 34
31. Question
A piece of wood is held under water. The upthrust on it will be:
- Question 32 of 34
32. Question
In a photocell light energy is converted into
- Question 33 of 34
33. Question
Among the following materials sound travels fastest in
- Question 34 of 34
34. Question
Which phenomenon do bats or dolphins use to find prey, predators or obstacles?