Free Waves MCQs with Answers
1,281 Waves MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Progressive waves transfer energy through oscillations, with wavelength, frequency, amplitude and wave speed related by v = fλ; sound speed depends on the medium. Superposition produces interference and stationary waves in strings and organ pipes, while simple harmonic motion describes the oscillation itself and must be distinguished from wave propagation.
Last updated
1,281 questions · page 49 of 65
- A. One
- B. Two
- C. Three
- D. Four
Explanation: In a standing wave on a string, the wave number 'k' is related to the number of loops (or antinodes) and the wavelength.
Correct answer: Four- A. Tension
- B. Length
- C. Total mass of string
- D. The point from where the string is plucked
Explanation: The speed of a wave on a stretched string depends on the tension in the string and the mass per unit length.
Correct answer: The point from where the string is plucked- A. 100 Hz
- B. 250 Hz
- C. 200 Hz
- D. 340 Hz
Explanation: To solve this problem, we start with the fact that the distance between a node and an anti-node is λ/4, where λ is the wavelength.
Correct answer: 100 Hz- A. 800 Hz
- B. 600 Hz
- C. 400 Hz
- D. 200 Hz
Explanation: fo= v/2ffc = v/4f = 1/2(v/2f) --> fc = 1/2(400) = 200 Hz
Correct answer: 200 Hz- A. 20m, 0.5 Hz
- B. 0.5m. 20 Hz
- C. 10m, 1 Hz
- D. 1 m, 10 Hz
Explanation: Time for half wave (crest to trough) T = 1 sTime for 1 wave (crest to crest) T = 2 sf = 1/T = 1/2 = 0.5 HzWavelength (crest to crest) =…
Correct answer: 20m, 0.5 Hz- A. 2Lf/m
- B. 2Mf2/L
- C. 4LMf2
- D. 4f2L3/M
Explanation: The fundamental frequency of a vibrating string is given by the formula f = (1/2L)√(T/μ), where f is the frequency, L is the length of the…
Correct answer: 4LMf2- A. Along the direction of the motion
- B. Perpendicular to the direction of wave motion
- C. Opposite to the direction of motion of the wave
- D. Repeat themselves over time
Explanation: Option B is correctIn transverse waves, the particles of the medium vibrate perpendicular to the direction of propagation of the wave.
Correct answer: Perpendicular to the direction of wave motion- A. Solid
- B. Liquid
- C. Gas
- D. All of these
Explanation: Option A is correct.The only medium that can transmit both transverse and longitudinal waves is a solid.Transverse waves can be produced…
Correct answer: Solid- A. 200 Hz
- B. 400 Hz
- C. 300 Hz
- D. 600 Hz
Explanation: Option D is correct.We know that:the frequency of the third harmonic of the organ pipe is:F3=nv/2L =3[340/2*0.85 =3(340/1.7) =3(200) =600Hz
Correct answer: 600 Hz- A. Amplitude
- B. Wavelength
- C. Speed
- D. Frequency
Explanation: Option A is correct.A louder sound will have a greater amplitude. Amplitude is the maximum displacement of the particles of the medium…
Correct answer: Amplitude- A. Intensity of sound
- B. Wavelength of sound
- C. Loudness of sound
- D. Frequency of sound
Explanation: Option D is correct.The pitch of a sound depends on its frequency.The pitch of a sound is how high or low it sounds.
Correct answer: Frequency of sound- A. 30 m
- B. 1 m
- C. 15m
- D. 900m
Explanation: Option B is correct.Given data: v=30ms-1, f=30HzFind out: λ=?Solution:The number of waves passing through a point per second in known as…
Correct answer: 1 m- A. Light waves
- B. Matter waves
- C. Electromagnetic waves
- D. Both "A" and "B"
Explanation: Option B is correct.Waves associated with microscopic particles moving at very high speed are called matter waves.
Correct answer: Matter waves- A. There is 180o phase shift
- B. A crest is converted into trough
- C. There is no change in phase shift
- D. Both A and B
Explanation: When a transverse wave is reflected from a rarer medium or a denser medium, there is no change of phase in either case.
Correct answer: There is no change in phase shift- A. Fundamental frequency
- B. Third harmonic
- C. Second harmonic
- D. Fourth harmonic
Explanation: Option B is correct.Yes, a 200 cm organ pipe with one end open which means that it is closed at other end and is in resonance with a sound…
Correct answer: Third harmonic- A. In air
- B. Under water
- C. Underground
- D. On earth
Explanation: Option B is correct.Sonar is a technique used for detecting objects underwater.
Correct answer: Under water- A. 10Hz
- B. 30Hz
- C. 40Hz
- D. 70Hz
Explanation: Option B is correct.We know that:For the fundamental mode of a stretched string L=λ/2 ⇒λ=2L ⇒ν 0 = λ/v = v /2L =60/2 =30 Hz
Correct answer: 30Hz- A. λn = 2E/n
- B. λn = 2En
- C. λn = 2n/E
- D. λn = E/2n
Explanation: The general formula for the wavelength of the stationary wave in a string is: λn = 2E/n
Correct answer: λn = 2E/n- A. λn = 2L/n
- B. λn = 3L/n
- C. λn = 4L/n
- D. λn = L/n
Explanation: The correct relation for the wavelength of a stationary wave in a closed-end organ pipe is given by λn = 4L/n.
Correct answer: λn = 4L/n- A. "B" leads "A" and move faster
- B. "B" is behind and moves slower
- C. Both move with same speed
- D. "B" leads "A" and moves slower
Explanation: As Car "A" is the source and car "B" observer.fB > fASo according to the Doppler effect, we can see that A is moving towards B, and as…
Correct answer: "B" leads "A" and moves slower