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NCERT Based Natural Science - Physics Questions For Competitive Exams
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NCERT Based Natural Science - Physics Questions For Competitive Exams
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25 Questions

1. The angle of minimum deviation of an equiangular prism, having a refractive index of 1.732 is
2. Planets are
3. The nearest star (other than the sun), which is visible to the naked eye is
4. An instrument has two strings. Both have the same length and are uniform. One of the strings is under twice as much tension as the other and also twice the mass of the other. Then which of the following statements is true?
5. The power of a convex lens is +2.5. Then its focal length is
6. Let WP and WE be the weights of a body at the north pole and at the equator, respectively. If the earth were not rotating then
7. Blue of the sky is due to the
8. The tail of a comet always points away from the sun due to
9. Planets do not twinkle because they
10. The magnitude of saturation photo electric current depends upon
11. The solar system belongs to the galaxy called
12. The function of fuse in an electrical circuit is
13. When a person enters a dark room from bright light, he is not able to see clearly for a little while because the
14. A resonant system has a fundamental frequency of 100 Hz. If the next higher frequency that gives a resonance are 300 Hz and 500 Hz, the system could be
15. Consider the following statements:
1. A pool of water looks shallower than it actually is.
2. Light bends towards the normal while travelling from water to air.
Which of the above statements is/are correct?
16. During summer, we feel comfortable under a fan because it
17. The advantage of AC over DC is that
18. The planet closest to the sun is
19. The hygrometer is an instrument to measure
20. The gravitational force with which the sun attracts the earth
1. is less than the force with which the earth attracts the sun
2. is the same as the force with which earth attracts the sun
3. is more than the force with which the earth attracts the sun
4. varies with the distance between them which of the above statements is/are correct?
21. The freezer in a refrigerator is fitted near the top
22. Scalding with steam is more severe than scalding by boiling water because
23. By what process is heat transmitted from the filament of an evacuated electric bulb to the glass?
24. The frequency of vibration of a stretched string is _______ its length.
25. Which one of the following would a hydrogen balloon find easiest to lift?

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