Exercise for Physics – Basic Questions up to Class 10 Important for Exams – Must Know Logics Part 3
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23. Who among the following laid the foundation of nuclear science in the country?
(a) Vikram Sarabhai
(b) Homi J Bhabha
(c) MGK Menon
(d) Raja Ramanan
Ans: (b)
24. Match the following
List – I Scientist | List – II Contribution |
---|---|
A. SN Bose | 1. Theory of numbers |
B. S Chandrasekhar | 2. Elementary particles, statistics |
C. S Ramanujan | 3. Astronomy |
D. Aryabhata | 4. Theory of black hole |
(a) 2 1 4 3
(b) 4 3 2 1
(c) 2 4 1 3
(d) 3 1 4 2
Ans: (c)
25.In our houses we get 220V AC, what does the value 220 represent?
(a) Constant voltage
(b) Effective voltage
(c) Average voltage
(d) Peak voltage
Ans: (b)
26. The quality of a sound depends upon the
I. size of the vibrating body
II. material of the vibrating body
III. overtones produced
IV. shape of the vibrating body
Choose the Correct Option:
(a) I, II, and III
(b) I, II, III and IV
(c) I and III
(d) II, III and IV
Ans: (b)
27. Of the following, the one representing a physical change is the
(a) rusting of iron
(b) freezing of water
(c) burning of coal
(d) souring of cream
Ans: (b)
28. If the temperature of a semiconductor raises, its resistivity will
(a) increase
(b) decrease
(c) remain constant
(d) reduce to zero
Ans: (b)
29. Superconductivity results when matter is
(a) heated to very high temperature
(b) compressed to very high pressure
(c) subjected to very low pressure
(d) cooled to very low temperature
Ans: (d)
30. Consider the following electromagnetic waves
1. X-rays
2. y-rays
3. microwaves
4. radio waves
What is the correct sequence in the order of their increasing energy?
(a) 4,3, 1,2
(b) 1,3, 2,4
(c) 4,2, 1,3
(d) 1,4, 3,2
Ans: (a)
31. The stars twinkle in the night because?
(a) The unit light intermittently
(b) The star՚s atmosphere absorbs light intermittently
(c) The earth՚s atmosphere absorbs light intermittently
(d) The refractive index of the air in atmosphere fluctuates
Ans: (d)
32. Mica is used in an electric iron because it is a?
(a) good conductor of electricity
(b) bad conductor of electricity
(c) good conductor of heat
(d) bad conductor of heat
Ans: (b)
33. Which of the following are phenomenon exhibited by sound waves?
1. Reflection
2. Refraction
3.Interference
4. Polarization
5. Diffraction
Choose the Correct Option:
(a) 1,2, 3,4
(b) 1,2, 3,5
(c) 1,3, 4,5
(d) 2,3, 4,5
Ans: (b)