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.
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- A. E / 2
- B. 2E
- C. E
- D. 4E
Explanation: For a string fixed at both ends, standing waves are formed with nodes at each end.
Correct answer: E- A. 1:1
- B. 2:1
- C. 1:2
- D. 1:4
Explanation: An organ pipe open at both ends (Pipe Y) has a fundamental frequency given by f = v/(2L), where v is the speed of sound and L is the…
Correct answer: 1:4- A. 1 m
- B. 3 m
- C. 2 m
- D. 4 m
Explanation: The length of the string is 4 m, and it supports 4 complete loops of stationary waves. Each loop corresponds to half a wavelength.
Correct answer: 2 m- A. Electromagnetic waves
- B. Sound waves
- C. Matter waves
- D. Water waves
Explanation: Sonar is derived from sound navigation and ranging. It is a technique which is used to detect and locate the objects like submarine…
Correct answer: Sound waves- A. L
- B. 1/L2
- C. 1/L
- D. L2
Explanation: The fundamental frequency of an organ pipe with one end closed is given by the formula f1 = v/(4L), where v is the speed of sound in air…
Correct answer: 1/L- A. A 2.3 m pipe with one end open and the other closed
- B. A 3.3 m pipe with one end open and the other closed
- C. A 1.6 m pipe with both ends open
- D. A 3.0 m pipe with both ends open
Explanation: The fundamental frequency of a pipe is determined by whether it is open or closed at its ends.
Correct answer: A 1.6 m pipe with both ends open- A. Wavelength/2
- B. 2 x amplitude
- C. Wavelength
- D. Period/2
Explanation: The interval PQ is the time taken for the oscillation to move from one point to another completing half a cycle, which corresponds to half…
Correct answer: Period/2- A. 0
- B. 395
- C. 130
- D. 790
Explanation: a = ω^2 x AWherea is the maximum accelerationω is the angular frequencyA is the amplitude of the waveω^2 = (2πf)^2= 4π^2f^2 = 4 x 9.8 x…
Correct answer: 790- A. The frequency of the wave
- B. The amplitude of the wave
- C. The wavelength of the wave
- D. The tension in the string
Explanation: The speed of a wave on a string depends on the tension in the string and the linear mass density of the string as described by the formula…
Correct answer: The tension in the string- A. Zero
- B. A
- C. 2A
- D. 4A
Explanation: During one complete vibration of an oscillating body in simple harmonic motion, the body travels from the equilibrium position to the…
Correct answer: 4A- A. P.E
- B. Acceleration
- C. Displacement
- D. K.E
Explanation: The correct answer is K.E, as kinetic energy is maximum at the mean position.
Correct answer: K.E- A. 650 Hz
- B. 20 Hz
- C. 3.8 x 10^2 Hz
- D. 26 Hz
Explanation: To find the frequency of the wave, use the formula that relates wave speed (v), frequency (f), and wavelength (λ): v = fλ.
Correct answer: 26 Hz- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: Frequency does not depend upon nature of material.When water waves pass from deep water into shallow water, the frequency of the waves…
Correct answer: Option B- A. Transverse waves
- B. Electromagnetic waves
- C. Mechanical waves
- D. Longitudinal waves
Explanation: Longitudinal waves involve changes in the volume and density of the medium.
Correct answer: Longitudinal waves995. The fundamental frequency of a closed organ pipe is 50 Hz. The frequency of the second overtone is
- A. 100 Hz
- B. 150 Hz
- C. 200 Hz
- D. 250 Hz
Explanation: In closed organ pipe 2nd over tone mean fifth harmonicf1 = 5f1, = 5 x 50 = 250HzThe frequency of the second overtone of the closed organ…
Correct answer: 250 Hz- A. Decreases
- B. Increases
- C. Remains unchanged
- D. None of these
Explanation: With the increase in temperature, the frequency of the sound from an organ pipe increases due to the increase in the speed of sound in the…
Correct answer: Increases- A. The particles of the medium are not disturbed
- B. The particles of the medium do not execute SHM
- C. There occurs no flow of energy along the wave
- D. The interference effect can't be observed
Explanation: Energy is a wave moves because of the motion of particle of the medium.
Correct answer: There occurs no flow of energy along the wave- A. λn = 2/nl
- B. λn = 2l/n
- C. λ= 1/2n
- D. None of these
Explanation: λn = 2l/nWhen the string vibrates in 'n' loops (higher harmonics), the wavelength is given by 2l/n, where 'l' is the length of the…
Correct answer: λn = 2l/n- A. 350 Hz
- B. 280 Hz
- C. 140 Hz
- D. 70 Hz
Explanation: The overtones of a vibrating string are integer multiples of the fundamental frequency.
Correct answer: 70 Hz- A. λ increases
- B. λ decreases
- C. λ remains same
- D. None of these
Explanation: The wavelength of a standing wave is inversely proportional to the number of loops.
Correct answer: λ decreases