10th class Physics unit 1 MCQs
chapter 1 MCQs 10th Class Physics
Simple Harmonic Motion and Waves:
1. Which one of the following is an example of simple harmonic motion?
a. The spinning of the earth on its axis
b. The motion of simple pendulum
c. A bouncing ball on a floor
d. The motion of ceiling fan
2. If the mass of the bob of a pendulum is increased by a factor of 3, the period of the pendulum’s motion will:
a. Be decreased by a factor of 2
b. Be increased by a factor of 2
c. Be decreased by a factor of 4
d. Remains the same
3. The mathematical formula of Hook’s law is:
a. F= -1/kx
b. F= -kx
c. F= -x/k
d. k= -2f/x
4. The formula for time period of simple pendulum is:
a. T = 2π√I/g
b. T = 2π√m/g
c. T = 2π√g/I
d. T = 2π√m/k
5. The formula for time period of mass spring is:
a. T = 1/2π √k/m
b. T = 2π √k/m
c. T = 2π √m/k
d. T = 1/2π √m/k
6. The kinetic energy of mass spring is maximum at the position:
a. Both are correct
b. Extreme position
c. Mean position
d. None
7. SI unit of amplitude is:
a. m
b. Second
c. cm
d. Hz
8. SI unit of frequency is:
a. Second
b. Hertz
c. Coulomb
d. Ampere
9. The number of waves passing through a point in one second is:
a. Wavelength
b. Frequency
c. Amplitude
d. Displacement
10. …………. provides restoring force to the moving simple pendulum:
a. Force of weight
b. Resistance of air
c. Inertia
d. Tension in string
11. The velocity at high level in simple harmonic motion:
a. Minimum
b. Maximum
c. Seldom minimum
d. Zero
12. The time period of a simple pendulum of length 1 m is:
a. 1.89 s
b. 1.99 s
c. 1.88 s
d. 2.11 s
13. Spring constant is:
a. k = -F/x
b. F = ma
c. w = mg
d. k = -x/F
14. Frequency is equal to:
a. T = 2π √1/g
b. f = 1/T
c. f = kx
d. f = 1/g
15. If we increase the mass of a bob through 3 m. then its time period will be:
a. Become less two times
b. Double
c. Becomes less four times
d. No change
16. Christian huygens discovered pendulum in:
a. 1756
b. 1856
c. 1956
d. 1656
17. If we double the length of simple pendulum, then its time period becomes:
a. 2T
b. √2T
c. T/2
d. T/√2
18. The back and forth motion of a body is called:
a. Vibratory motion
b. Rotatory motion
c. Circular motion
d. Random motion
19. A spider detects its prey due to …… produced in the web:
a. Collision
b. Motion
c. Circulation
d. Vibration
20. A human eardrum can oscillate back and forth up to……… times in one second:
a. 200,000
b. 2000
c. 20
d. 20000
21. Simple harmonic motion is a kind of:
a. Random motion
b. Circular motion
c. Translatery motion
d. Vibratory motion
22. The kinetic energy at extreme position executing SH M is:
a. Zero
b. Minimum
c. Maximum
d. None
23. The kinetic energy at mean position executing SHM is:
a. Zero
b. Minimum
c. Maximum
d. None
24. The potential energy at mean position executing SHM is:
a. Zero
b. Minimum
c. Maximum
d. None
25. The potential energy at extreme position executing SHM is:
a. Zero
b. Minimum
c. Maximum
d. None
26. The spring constant in SHM is represented by:
a. G
b. k
c. g
d. K
27. A body executing SHM does not stop at mean position due to:
a. Gravitational force
b. Restoring force
c. Weight
d. Inertia
28. In F=-kx, the minus sign indicates that the force exerted by the spring is always directed ……… to the displacement of the mass:
a. Equal
b. Opposite
c. Parallel
d. Same
29. The restoring force is directly proportional to the……… from the mean position:
a. Rotation
b. Displacement
c. Acceleration
d. Net force
30. In SHM, the acceleration at the mean position is:
a. Zero
b. Maximum
c. Minimum
d. None
31. In SHM, the acceleration at the extreme position is:
a. Zero
b. Maximum
c. Minimum
d. None
32. In SHM, the velocity at the mean position is:
a. Zero
b. Maximum
c. Minimum
d. None
33. In SHM, the acceleration produced is directly proportional to the:
a. Velocity
b. Displacement
c. Mean position
d. Net force
34. The motion of a ball and bowl is a type of
a. Rotatory motion
b. Simple harmonic motion
c. Random motion
d. Circular motion
35. The motion of a mass attached to a spring on a horizontal surface is a type of:
a. Rotatory motion
b. Simple harmonic motion
c. Random motion
d. Circular motion
36. The motion of a simple pendulum is a type of:
a. Rotatory motion
b. Simple harmonic motion
c. Random motion
d. Circular motion
37. The component of the weight which acts as restoring force in the simple pendulum is
a. mgTanθ
b. mgCosθ
c. mgCosecθ
d. mgSinθ
38. The period of a pendulum is independent of its………:
a. Mass
b. Amplitude
c. Both
d. None
39. The direction of acceleration produced in SHM is always directed towards:
a. Displacement
b. Extreme position
c. Velocity
d. Mean position
40. In simple pendulum, the weight of the bob and tension in the string are always
a. Towards mean position
b. Opposite to each other
c. Towards extreme position
d. In the same direction
41. In SI, the unit of amplitude is:
a. Kilo meter
b. Second
c. Newton
d. Meter
42. The oscillations of a system in the presence of some resistive force is called:
a. Damped oscillations
b. Simple harmonic motion
c. Random motion
d. Vibratory motion
43. Shock absorber is an application of:
a. Damped oscillations
b. Simple harmonic motion
c. Random motion
d. Vibratory motion
44. The liquid used in shock absorbers to move the piston is called:
a. Water
b. Oil
c. Alcohol
d. Grease
45. Waves transfer:
a. Wavelength
b. Energy
c. Velocity
d. Frequency
46. Which of the following method is used to transfer energy?
a. Wave motion
b. Conduction
c. Radiation
d. All of these
47. Radio waves are:
a. Electromagnetic waves
b. Electric waves
c. Both
d. None of these
48. Basic types of waves are:
a. Three
b. One
c. Four
d. Two
49. Which of the following waves are the lightest?
a. Television waves
b. Radio wave
c. X rays
d. Sound waves
50. The waves which require any material medium for their propagation are called:
a. Radio Waves
b. Mechanical waves
c. Electromagnet Waves
d. None
51. The waves which do not require any material medium for their propagation are called:
a. Water waves
b. Mechanical waves
c. None
d. Electromagnetic waves
52. The example of radio waves is:
a. X-rays
b. Water waves
c. Sound waves
d. Slinky waves
53. The example of mechanical waves is:
a. Television waves
b. Water waves
c. Light waves
d. X-rays
54. Which of the following devices can be used to produce both transverse and longitudinal waves?
a. A helical spring(slinky)fork
b. A) A string
c. A tuning
d. A ripple tank
55. In vacuum, all electromagnetic waves have the same:
a. Amplitude
b. Speed
c. Wavelength
d. Frequency
56. The relation among velocity, frequency and wavelength of a wave is:
a. vλ = f
b. vf = λ
c. v =λ/f
d. fλ = v
57. In which state of matter, longitudinal waves travel faster?
a. Gas
b. Liquid
c. A and B both
d. Solid
58. The example of longitudinal waves is:
a. Radio waves
b. Sound waves
c. Water waves
d. Light waves
59. Wave equation is:
a. v =1/T
b. v =S/t
c. v =f/T
d. v = f λ
60. The product of wave frequency and wave length is called:
a. Wave speed
b. Time period
c. Frequency
d. Amplitude
61. Types of mechanical waves are:
a. Four
b. Two
c. Five
d. Three
62. The frequency of wave moving on slinky is 4 Hz and wave length is 0.4 m. The speed of wave will be:
a. 16m
b. 16ms-1
c. 1.6m
d. 1.6ms-1
63. Relation between time, speed and distance is called:
a. v =t2/d
b. v =d/t
c. v = t/d
d. v = dt
64. Which of the following device is used to produce both transverse and longitudinal waves?
a. Helical spring
b. String
c. Tuning fork
d. Ripple tank
65. The waves in which the particles of the waves move back and forth are called:
a. Mechanical waves
b. Transverse waves
c. Radio waves
d. Longitudinal waves
66. The speed of longitudinal waves is maximum in:
a. Gases
b. Solids
c. Plasma
d. Liquids
67. The distance between two consecutive compressions and rarefactions is called:
a. Wavelength
b. Amplitude
c. Time period
d. Frequency
68. The distance between two consecutive crests and troughs is called:
a. Wavelength
b. Amplitude
c. Time period
d. Frequency
69. The regions of the longitudinal waves where the loops of the spring are closed to each other are called:
a. Crests
b. Compressions
c. Troughs
d. Rarefactions
70. The regions of the longitudinal waves where the loops of the spring are spaced apart are called:
a. Crests
b. Compressions
c. Troughs
d. Rarefactions
71. In transverse waves the highest points of the particles of the medium from the mean position are called:
a. Crests
b. Compressions
c. Troughs
d. Rarefactions
72. In transverse waves the lowest points of the particles of the medium from the mean position are called:
a. Crests
b. Compressions
c. Troughs
d. Rarefactions
73. In transverse wave, the motion of the particles of the medium and the motion of wave is ……… to each other:
a. In the same direction
b. Perpendicular
c. In the opposite direction
d. Parallel
74. Which of the following characteristic of a wave is independent of the others?
a. Amplitude
b. Speed
c. Wavelength
d. Frequency
75. A large ripple tank with a vibrator working at a frequency of 30Hz produces 25 complete waves in a distance of 50cm. the velocity of the wave is
a. 75cms-1
b. 35cms-1
c. 1500cms-1
d. 60cms-1
76. Ripple tank is a device that is used to study the characteristics of ………:
a. Mechanical waves
b. Water waves
c. Electric waves
d. Sound waves
77. The bending or spreading of waves around the sharp edges is called:
a. Diffraction
b. Reflection
c. Interference
d. Refraction
78. Which of the following quantity does not change during the refraction?
a. Wave length
b. Speed
c. Frequency
d. Direction
79. The ……… of waves is independent of the other characteristics.
a. Amplitude
b. Speed
c. Wave length
d. Frequency
80. When water waves enter in a shallower region, then its wave length becomes:
a. Zero
b. Decrease
c. Remains same
d. Increase
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