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. Zero
- B. Infinite
- C. Maximum
- D. Information is Insufficient
Explanation: The potential energy (U) of a spring at its equilibrium position is zero.
Correct answer: Zero- A. 1.2 s
- B. 3.4 s
- C. 8.1 s
- D. 9.6 s
Explanation: The correct option is D. It is given that the observer is moving at a speed of 0.95 c .
Correct answer: 9.6 s- A. 170 Hz, 340 Hz, 510 Hz
- B. 120 Hz, 220 Hz, 390 Hz
- C. 90 Hz., 230 Hz, 440 Hz
- D. 210 Hz, 410 Hz, 510 Hz
Explanation: For a pipe opened at both ends, the fundamental frequency is given by F1 = v/2L. In this case, F1 = 340/2(1) = 170 Hz.
Correct answer: 170 Hz, 340 Hz, 510 Hz- A. 0°
- B. 90°
- C. 180°
- D. 270°
Explanation: A wave's phase refers to a point's position on the wave cycle at a given time.
Correct answer: 180°- A. mass
- B. length
- C. vibration
- D. tension in the string
Explanation: Increasing the vibration of a simple pendulum can actually reduce the uncertainty in its time period.
Correct answer: vibration- A. E = mgh
- B. E = 1/2 kxo2
- C. E = 1/2 mv2
- D. E = -GMm/R
Explanation: In a spring-mass system, the maximum potential energy occurs when the spring is stretched or compressed to its maximum displacement, which…
Correct answer: E = 1/2 kxo2- A. A
- B. B
- C. C
- D. D
Explanation: The potential energy stored in a spring is given by Hooke's Law, which states that the force exerted by a spring is directly proportional…
Correct answer: A- A. A
- B. B
- C. C
- D. D
Explanation: Damping refers to the dissipative forces that act on an oscillating system, causing it to lose energy and eventually come to rest.
Correct answer: A- A. A
- B. B
- C. C
- D. D
Explanation: In the absence of damping forces, the amplitude of oscillations in a vacuum due to forced oscillations can become arbitrarily large during…
Correct answer: B- A. f2 - f1
- B. f2 x f1
- C. f1 - f2
- D. f2 + f1
Explanation: The beat frequency is the difference in frequency between two interacting waves.
Correct answer: f2 - f1- A. Its acceleration is directly proportional to displacement and directed towards the mean position
- B. Its acceleration is inversely proportional to displacement and directed away from the mean position
- C. Its acceleration is inversely proportional to displacement and directed towards the mean position
- D. Its acceleration is directly proportional to displacement and directed away from the mean position
Explanation: In simple harmonic motion (SHM), a body moves in such a way that its acceleration is directly proportional to its displacement from a…
Correct answer: Its acceleration is directly proportional to displacement and directed towards the mean position- A. 200Hz
- B. 150Hz
- C. 12.5Hz
- D. 250Hz
Explanation: Since in case of string fixed at both ends harmonics are integral multiple of fundamental frequency, fn =n(f)So, for fourth harmonic, f4 =…
Correct answer: 200Hz- A. Distance
- B. Displacement
- C. Amplitude
- D. Frequency
Explanation: In vibratory motion, maximum displacement of body on either side of its equilibrium position is known as amplitude.
Correct answer: Amplitude- A. Frequency
- B. Amplitude
- C. Wavelength
- D. Value of 'g'
Explanation: One characteristic of SHM is that the period of the vibration is independent of its amplitude
Correct answer: Amplitude- A. Four times
- B. Two times
- C. Half
- D. one fourth
Explanation: By understanding the relationship between the length of a pendulum and its time period, we can deduce that if the length becomes four…
Correct answer: Two times- A. 2T
- B. 4T
- C. 8T
- D. 16T
Explanation: The frequency of a stretched string is given by the formula f = (1/2L)√(T/μ), where T is the tension, L is the length of the string, and μ…
Correct answer: 4T- A. Minimum
- B. Maximum
- C. Zero
- D. Greater than its kinetic energy
Explanation: In SHM, kinetic energy is maximum at mean position and zero at the extreme positions while potential energy is zero at mean position and…
Correct answer: Maximum- A. 4√2 mm
- B. 4√3 mm
- C. 8 mm
- D. 4 mm
Explanation: Explanation: x = 8.0 sin(10π/3 × 0.05) = 8.0 sin(π/6) = 8.0 × 0.5 = 4.0 mm
Correct answer: 4 mm- A. a ∝ x
- B. a ∝-x
- C. a=x
- D. a = kx
- E. a = -x
Explanation: The most appropriate mathematical expression of smple harmonic motion is: a directly proprtional -x, so option B is correct answer.
Correct answer: a ∝-x- A. Never
- B. After 10 minutes
- C. In 10 minutes
- D. Immediately
Explanation: In the absence of resistive forces, the oscillations will never stop. In simple harmonic motion, such as oscillations of a mass-spring…
Correct answer: Never