1st Year Physics Chapter Eight Waves MCQs Quiz Test

 If you are looking first Year Chapter Eight Physics WAVES Chapter Wise MCQs question answers, You are here on right website all of these Multiple Choice Question answers are helpful for learning exams MCQs Questions with solutions. Learn these important Key points for upcoming board exams and tests preparations.

1st Year Physics Chapter Eight Waves MCQs

On this website you will learn first Year Physics Unit Eight WAVES MCQs with solved Answers. Mostly past papers important MCQs are helpful for getting better marks. You will easily learn this chapter by learning these solved MCQs of WAVES.

Important Key Points You Will Learn in Chapter Eight:

• Progressive Waves
• Periodic Waves
• Speed of sound in air
• Effect of Pressure, Density, and Temperature on the speed of sound in air
• Principle of Superposition
• Interference
• Beats
• Reflection of Waves
• Stationary Waves
• Stationary waves in a Stretched String
• Stationary waves in air columns
• Doppler Effect
• Applications of Doppler Effect

Q.1: Which of the following is not the property of sound?

1. It can travel in a vacuum
2. It is reflected
3. It shows phenomenon interference
4. It is propagated as longitudinal wave

A

Q.2: The wave that requires a material medium for their propagation are called?

1. Matter waves
2. Electromagnetic waves
3. Carrier waves
4. Mechanical waves

D

Q.3: Which organ produces a better quality of sound?

1. Closed organ pipe
2. Open organ pipe
3. Both a and b
4. None of these

B

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

1. Decreases
2. Increases
3. Remains unchanged
4. Becomes zero

C

Q.5: In vibrating cord, the points where the amplitude is maximum, are called?

1. Antinodes
2. Nodes
3. Troughs
4. Crests

C

Q.6: Echo is the phenomenon of?

1. Interference of sound
2. Reflection of sound
3. Refraction of sound
4. None of these

D

Q.7: The phase difference between particles being on either side of a node?

1. π
2. π/2
3. 2π
4. π/4

C

Q.8: If the stretching force T of wire increases, then its frequency?

1. Decreases
2. Increases
3. Remains the same
4. All of the above

C

Q.9: A stationary wave is set up in the air column of a closed pipe. At the closed end of the pipe?

1. Always a node is formed
2. Always an antinode is formed
3. Neither nod nor antinode is formed
4. Sometimes a node and sometimes an antinode is formed

D

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

1. Refraction
2. Polarization
3. Interference
4. Diffraction

A

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

1. Adiabatic
2. Isothermal
3. Isobaric
4. Isochoric

C

Q.12: Beats are result of?

1. Diffraction
2. Constructive interference
3. Destructive interference
4. Alternate constructive and destructive interference

C

Q.13: The velocity of sound in a vacuum is?

1. 332ms^-1
2. 320ms^-1
3. Zero
4. 224ms^-1

C

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

1. 1.61ms^-1
2. 61.0ms^-1
3. 0.61ms^-1
4. 2.00ms^-1

B

Q.15: Energy is not transferred by?

1. Longitudinal waves
2. Transverse waves
3. Stationary waves
4. Electromagnetic waves

B

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

1. Increases
2. Decreases
3. Remains unchanged
4. May increase or decrease

D

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

1. 313°C
2. 586°C
3. 819°C
4. 1172°C

D

Q.18: At antinodes produced in sound waves:?

1. The pressure is minimum and velocity is maximum
2. The pressure is maximum and velocity is minimum
3. Pressure is maximum
4. None of these

B

Q.19: For ultrasonic waves:?

1. Frequency is in the audible range
2. Frequency is greater than 20 kHz
3. Frequency lower than 20 Hz
4. All of the above

C

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

1. Silence zone
2. Interference
3. Beats
4. Resonance

B

Q.21: The number of beats produced per second is equal to?

1. The sum of frequencies of two tuning forks
2. The difference of frequencies of two tuning forks
3. The ratio of the frequencies of two tuning forks
4. The frequency of either of two tuning forks

B

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

1. 0°
2. 90°
3. 180°
4. 76°

D

Q.23: Silence zone takes place due to:?

1. Constructive interference
2. Destructive interference
3. Beats
4. Resonance

D

Q.24: Doppler effect applies to:?

1. Sound wave only
2. Lightwave only
3. Both sound and light waves
4. Neither sound nor lightwave

C

Q.25: Do dolphins navigate by using?

1. Echolocation
2. Doppler effect
3. Reflection of waves
4. All of these

D

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

1. 5 to 10 Hz
2. 5 to 10 MHz
3. 15 – to 100 MHz
4. None of these

A

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

1. f_open = 2 f_closed
2. f_closed = 2f_open
3. f_open = f_closed
4. f_open = 1/f_closed

D

Q.28: In open organ pipe:?

1. Only even harmonics are present
2. Only odd harmonics are present
3. Both even and odd harmonics are present
4. Selected harmonics are present

D

Q.29: Which one is the correct relation for speed of sound?

1. V_Newton = V_Laplace
2. V_Newton = γV_Laplace
3. V_Newton = √V_Laplace
4. V_Laplace = √V_Newton

C

Q.30: If the temperature increases the frequency of tuning fork?

1. Increases
2. Decreases
3. No change
4. None of these

C

Q.31: The particles in the wave separated through ------------ multiple of λare out of phase to each other?

1. (n)
2. (n+1)
3. (n+1/2)
4. Both a and c

B

Q.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?

1. Longitudinal
2. Transverse
3. Periodic
4. Both b and c

A

Q.33: Newton formula estimated the speed of sound?

1. 281ms^-1
2. 333ms^-1
3. 340ms^-1
4. All of these

B

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

1. Isothermal law
2. Adiabatic law
3. Isochoric law
4. All of the above

D

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

1. nλ
2. (n+1/2) λ
3. Sometimes nλ and sometimes (n+1/2) λ
4. None of these

C

Q.36: The speed of sound in hydrogen is _________ time than that in oxygen?

1. Two times
2. Three times
3. Four times
4. Six times

A

Q.37: The beats frequency (sensible) for a human car is?

1. 24Hz
2. 10Hz
3. 12Hz
4. 16Hz

B

Q.38: The speed of stationary waves in a stretched string is independent of?

1. Number of loops
2. Tension in the string
3. Point where a string is plucked
4. Both a and c

C

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

1. 60°
2. 120°
3. 180°
4. 0°

A

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

1. Doppler’s effect
2. Interference of waves
3. Beats phenomenon
4. All of these

C