Physics 1st Year Chapter 07 Oscillations MCQs with Answers

Check out the Physics 1st Year Chapter 07 Oscillations MCQs with Answers here. This chapter is about Oscillations. The to and fro motion of a body about its mean position is called Oscillatory Motion. This chapter is about the oscillations of a body and its properties. The first important thing about Oscillations is Simple Harmonic Motion (SHM). It includes Instantaneous displacement and amplitude of vibration, Time Period, Frequency, and Angular Frequency of body performing SHM. Horizontal Mass Spring System and Simple Pendulum are good experiments for Oscillations. Resonance is an important term described in the chapter. Some of the oscillations are Damped. These are expressed in this chapter with detail.  So, get the important MCQs of this chapter here online.

Physics 1st Year Chapter 07 Oscillations MCQs with Answers

 

Question#1. In vibratory motion:

• P.E remains constant
• K.E remains constant
• Total energy remains constant
• Total momentum remains constant

Question#2. The waveform of S.H.M. is?

• Standing wave
• Sine wave
• Square wave
• Rectangular waves

Question#3. If the spring constant is halved then the new constant will be?

• 3k
• 2k
• 4k
  
• k/2

Question#4. In S.H.M. the velocity of a particle is maximum at?

• Mean position
  
• Extreme position
• The middle between mean and extreme position on the right side
• The middle between mean and extreme position on the left side

Question#5. The acceleration of a projection on the diameter of a particle moving along a circle is?

• ω²x
• ωx²
• – ω²x
• – ωx²

Question#6. The total energy of a body executing S.H.M. is directly proportional to?

• The square root of amplitude
• The amplitude
• Reciprocal of amplitude
• Square of amplitude

Question#7. The time period of a second’s pendulum is?

• 4 seconds
• 3 seconds
• 2 seconds
• 6 seconds

Question#8. The length of a simple pendulum on the surface of Earth is 1m, its length on the surface of the moon, where g is 1/6^th value of g on the earth is?

• Remain the same
• 6m
• 1/6m
• 1/36m

Question#9. If the length of a pendulum becomes four times, then its time period will become?

• Four times
• Six times
• Eight times
  
• Two times

Question#10. Is the force responsible for the vibratory motion of the simple pendulum is?

• mg cos θ
• mg sin θ
• mg tan θ
• mg

Question#11. The tension in the string of simple pendulum is?

• Constant
• Maximum at the extreme position
• Maximum at the mean position
• Zero at the mean position

Question#12. The wave produced in the microwave oven has a wavelength of?

• 12 m
• 1.2 cm
• 12cm
• 12 μm

Question#13. The SI unit of force constant is identical to that of?

• Force
• Pressure
• Surface tension
• Loudness

Question#14. When the amplitude of an SHM becomes double, its energy becomes?

• Double
• Four times
• One half
• None time

Question#15. A simple pendulum suspended from the ceiling of a lift has a time period T when the lift is at rest. When the lift falls freely than its:

• Time period becomes zero
• Acceleration becomes zero
• Vibration is stopped
• Frequency becomes infinity

Question#16. The energy of SMH is maximum at?

• Mean position
• Extreme position
• In between mean and extreme
• All position during SHM

Question#17. If a hollow bob of a simple pendulum be filled with mercury that drains out slowly, its time period?

• Increase continuously
• Decreases continuously
• Remain the same
• First increases then decrease

Question#19. The displacement of SHM is written as x = x₀ sinωt. If displacement is written by x = x₀ cos ωt then phase constant will be equal to?

• 0°
• 45°
• 90°
• 180°

Question#20. For what displacement the P.E of SHM becomes ¼ of its maximum value?

• x = x₀
• x = x₀/2
• x = x₀/4
• x = x₀²/2

Question#21. K.E and P.E of a spring-mass system executing SHM become equal at with displacement? (A being the amplitude).

• ± √2A
• ±1/ √2 A
• ± 1/2A
• 1/ √2 A

Question#22. Which one does not work according to resonance?

• T.V
• Radio
• Microwave oven
• Bulb

Question#23. Which of the given equation is correct in SHM?

• T.E = ½ kx₀²
• T.E  = K.E_max
• T.E = P.E_max
• All are correct

Question#24. The phase of SHM describes?

• Displacement only
• The direction of motion only
• Both displacement and direction of motion
• Neither displacement nor direction of motion

Question#25. The natural frequency of a simple pendulum depends upon?

• It’s mass
• It’s length
• Square of its length
• The square root of its length

Question#26. Electrical resonance is observed in?

• Radio
• Microwave oven
• Both in radio and microwave oven
• Neither in radio nor in a microwave oven

Question#27. Total distance traveled by a bob of a simple pendulum in one vibration is equal to?

• Amplitude
• Square of amplitude
• Twice of amplitude
• Four times of amplitude

Question#28. When K.E energy of SHM is maximum, its?

• P.E is zero
• Acceleration is zero
• Restoring force is zero
• All P.E acceleration & restoring force are zero

Question#29. In damped harmonic oscillation, which one decreases?

• Amplitude of vibration
• Energy of vibration
• Both amplitude and energy
• Neither amplitude nor energy

Question#30. Forced vibrations are known as?

• Simple harmonic vibration
• Natural vibration
• Driven harmonic vibration
• Free vibration

Question#31. Do mechanical springs behave like?

• Resistances
• RC – series circuit
• Capacitances
• None of these

Question#32. At Murree Hills (Assume the value of g changes). If we use a simple pendulum as a time standard then the one-second duration will?

• Increase
  
• Decrease
• Remain the same
• Is zero

Question#33. SMH described by x = cos(t), has frequency of?

• 2πHz
• 1/2π Hz
• πHz
• Cannot be predicted

Question#34. The projection of the particle moving in a circle with non-uniform angular speed executes.

• S.H.M.
• Vibratory motion
• Both b and d
• None S.H.M.

Question#35. If an oscillator starts vibrating from negative extreme, its phase constant will be?

• π/2rad
• πrad
• 3π/2 rad
• 0°

Question#36. For a simple pendulum, the restoring force is caused by?

• Gravity
• Spring
• Hand
• All of these

Question#37. The distance covered by a body in one complete vibration is 20cm. What is the amplitude of the body?

• 10cm
• 5cm
  
• 15cm
• 7.5cm

Question#38. If the mass of the spring-mass oscillator becomes half the squared frequency will be?

• Quadruple
• Half
• Double
  
• Remain the same

Question#39. In the case of a simple pendulum, the cause of damping is?

• Drag force of air
• Gravity
• Tension in string
• None of these

Question#40. The energy absorbed by a body is _________ at resonance.

• Maximum as well minimum
• Minimum only
• Maximum only
• Zero