Physics Chapter 08 Waves Online Mcqs 1st Year with Answers

Check out the Physics Chapter 08 Waves Online Mcqs 1st Year with Answers here. This chapter is about the studies of waves and their properties. Waves carry energy without carrying matter. Waves contain Progressive waves which have two kinds i.e. Transverse and Longitudinal waves. Periodic waves also consist of two kinds i.e. Transverse Periodic Waves and Longitudinal Periodic Waves. Waves also travel by the speed of sound in air. The speed of sound in the air can be affected by a change in Density and Temperature. Waves also show Reflection. Stationary waves have two sections (in a stretched string and in an air column). The most important one is the Doppler Effect. Doppler Effect has many applications in daily life. So, if you want to check the important MCQs of this chapter, then scroll down and get on this page.

Physics Chapter 08 Waves Online Mcqs 1st Year with Answers

KEY POINTS

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Question#1. Which of the following is not the property of sound?

• It can travel in a vacuum
  
• It is reflected
• It shows phenomenon interference
• It is propagated as longitudinal wave

Question#2. The wave that requires a material medium for their propagation are called?

• Matter waves
• Electromagnetic waves
• Carrier waves
• Mechanical waves

Question#3. Which organ produces a better quality of sound?

• Closed organ pipe
• Open organ pipe
  
• Both a and b
• None of these

Question#4. When two identical traveling waves are superimposed, the velocity of the resultant wave:

• Decreases
• Increases
• Remains unchanged
  
• Becomes zero

Question#5. In vibrating cord, the points where the amplitude is maximum, are called?

• Antinodes
• Nodes
• Troughs
  
• Crests

Question#6. Echo is the phenomenon of?

• Interference of sound
• Reflection of sound
• Refraction of sound
• None of these

Question#7. The phase difference between particles being on either side of a node?

• π
• π/2
• 2π
  
• π/4

Question#8. If the stretching force T of wire increases, then its frequency?

• Decreases
• Increases
• Remains the same
  
• All of the above

Question#9. A stationary wave is set up in the air column of a closed pipe. At the closed end of the pipe.

• Always a node is formed
• Always an antinode is formed
• Neither nod nor antinode is formed
• Sometimes a node and sometimes an antinode is formed

Question#10. It is possible to distinguish between transverse and longitudinal waves form the property of?

• Refraction
• Polarization
• Interference
• Diffraction

Question#11. According to Newton sound travel in the air under the conditions of which type of process?

• Adiabatic
• Isothermal
• Isobaric
  
• Isochoric

Question#12. Beats are result of?

• Diffraction
• Constructive interference
• Destructive interference
• Alternate constructive and destructive interference

Question#13. The velocity of sound in a vacuum is?

• 332ms^-1
• 320ms^-1
• Zero
  
• 224ms^-1

Question#14. Increase in the velocity of sound in the air of 1°C rise in temperature is?

• 1.61ms^-1
• 61.0ms^-1
• 0.61ms^-1
• 2.00ms^-1

Question#15. Energy is not transferred by?

• Longitudinal waves
• Transverse waves
• Stationary waves
• Electromagnetic waves

Question#16. On loading the pong of a tuning fork with wax, its frequency?

• Increases
• Decreases
• Remains unchanged
• May increase or decrease

Question#17. The velocity of sound in the air would become double then its velocity at 0°C at temperature?

• 313°C
• 586°C
• 819°C
• 1172°C

Question#18. At antinodes produced in sound waves:

• The pressure is minimum and velocity is maximum
• The pressure is maximum and velocity is minimum
• Pressure is  maximum
• None of these

Question#19. For ultrasonic waves:

• Frequency is in the audible range
• Frequency is greater than 20 kHz
• Frequency lower than 20 Hz
• All of the above

Question#20. The periodic alternation of sound between the maximum and minimum loudness is called?

• Silence zone
• Interference
• Beats
• Resonance

Question#21. The number of beats produced per second is equal to?

• The sum of frequencies of two tuning forks
• The difference of frequencies of two tuning forks
• The ratio of the frequencies of two tuning forks
• The frequency of either of two tuning forks

Question#22. A wave in soft string reflects from a hard steel rod. Its phase difference relative in the incident wave will be?

• 0°
• 90°
• 180°
• 76°

Question#23. Silence zone takes place due to:

• Constructive interference
• Destructive interference
• Beats
• Resonance

Question#24. Doppler effect applies to:

• Sound wave only
• Lightwave only
• Both sound and light waves
• Neither sound nor lightwave

Question#25. Do dolphins navigate by using?

• Echolocation
• Doppler effect
• Reflection of waves
• All of these

Question#26. To monitor blood flow through major arteries, ultrasonic waves of which frequencies are employed?

• 5 to 10 Hz
• 5 to 10 MHz
• 15 – to 100 MHz
• None of these

Question#27. Which one is the correct relation for fundamental frequency of open and closed pipe?

• f_open = 2 f_closed
• f_closed = 2f_open
• f_open = f_closed
• f_open = 1/f_closed

Question#28. In open organ pipe:

• Only even harmonics are present
• Only odd harmonics are present
• Both even and odd harmonics are present
• Selected harmonics are present

Question#29. Which one is the correct relation for speed of sound?

• V_Newton = V_Laplace
• V_Newton = γV_Laplace
• V_Newton = √V_Laplace
• V_Laplace = √V_Newton

Question#30. If the temperature increases the frequency of tuning fork?

• Increases
• Decreases
• No change
• None of these

Question#31. The particles in the wave separated through _______ multiple of λare out of phase to each other.

• (n)
• (n+1)
• (n+1/2)
• Both a and c

Question#32. Waves are produced at the surface of the water by a pencil executing periodic motion if held vertically at a frequency of 50Hz are?

• Longitudinal
• Transverse
• Periodic
• Both b and c

Question#33. Newton formula estimated the speed of sound?

• 281ms^-1
• 333ms^-1
• 340ms^-1
• All of these

Question#34. Laplace found that the alternate compression and refractions produced in sound waves follow?

• Isothermal law
• Adiabatic law
• Isochoric law
• All of the above

Question#35. For destructive interference of sound waves, the path difference between two interfering sounds should be?

• nλ
• (n+1/2) λ
• Sometimes nλ and sometimes (n+1/2) λ
• None of these

Question#36. The speed of sound in hydrogen is _________ time than that in oxygen?

• Two times
• Three times
• Four times
• Six times

Question#37. The beats frequency (sensible) for a human car is?

• 24Hz
• 10Hz
  
• 12Hz
• 16Hz

Question#38. The speed of stationary waves in a stretched string is independent of?

• Number of loops
• Tension in the string
• Point where a string is plucked
• Both a and c

Question#39. If two waves of the amplitude of ‘x’ produce a resultant wave of amplitude ‘x’ then the phase difference between them will be?

• 60°
• 120°
• 180°
• 0°

Question#40. Which phenomenon can be applied to estimate the velocity of the star with respect to Earth?

• Doppler’s effect
• Interference of waves
• Beats phenomenon
• All of these