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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1,281 questions · page 53 of 65
- A. 2λ, v
- B. λ, 2v
- C. λ/2, v
- D. λ, v/2
Explanation: Speed of sound in any medium depends upon the properties of the medium.
Correct answer: λ/2, v- A. 40 Hz
- B. 125 Hz
- C. 250 Hz
- D. 500 Hz
Explanation: The explanation is given below : The period of the oscilloscope T is:The explanation is given below :
Correct answer: 125 Hz- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: The general formula for wavelength of stationary wave closed-end organ pipe is given by: λn = 4E/n
Correct answer: Option C- A. Compton effect
- B. Doppler's effect
- C. Stefan's law
- D. Pascal's law
Explanation: Astronomers use the Doppler Effect (Doppler shift) to determine the speed of stars and galaxies by comparing the spectrum of light from…
Correct answer: Doppler's effect- A. Vibratory motion
- B. Rotatory motion
- C. SHM
- D. Translational motion
Explanation: When a body is moving along the circumference of circle with constant angular velocity, then its projection performs SHM along the…
Correct answer: SHM1046. The displacement of the particle executing SHM is given by x = 0.01 sin (100πt). The time period is:
- A. 0.01 sec
- B. 0.2 sec
- C. 0.02 sec
- D. 0.1 sec
Explanation: x = 0.01sin (100πt) x = xosin (ωt) By comparing ω = 100π --> 2π/T = 100π --> T = 1/50 = 0.02 sec
Correct answer: 0.02 sec- A. Force
- B. Surface tension
- C. Pressure
- D. Intensity
Explanation: The unit of surface tension and spring constant is N/m.
Correct answer: Surface tension- A. It is the middle position between two extremes
- B. Acceleration is zero at this position
- C. Displacement is zero at this position
- D. Both "B" and "C"
Explanation: A body is in equilibrium position during SHM if it has zero acceleration and acceleration will be zero if displacement is also zero.a =…
Correct answer: Both "B" and "C"- A. 0.125 seconds
- B. 8 seconds
- C. 0.25 seconds
- D. 4 seconds
Explanation: x = 0.25sin (π/4)t x = xosin ((ωt) By comparing ω = π/4 -->2π/T = π/4 --> T= 8 s
Correct answer: 8 seconds- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: When a body moves from mean to extreme position then displacement increases, magnitude of acceleration increases but in opposite direction…
Correct answer: Option A- A. 2000 Nm-1
- B. 600 Nm-1
- C. 8000 Nm-1
- D. 4000 Nm-1
Explanation: The effective spring constant of multiple springs acting in parallel is equal to the sum of each individual spring constant.
Correct answer: 8000 Nm-1- A. f = 2πω
- B. ω = 2πf
- C. f = 1/2πω
- D. f = 1/ω
Explanation: ω = 0/TFor one revolution0 = 2π radSo, ω = 2π(1/T) = 2πf
Correct answer: ω = 2πf- A. P and R
- B. Q and S
- C. Q and T
- D. S and T
Explanation: The wavelength of the transverse water wave is the distance between two successive points which are moving in phase.
Correct answer: Q and T- A. A
- B. B
- C. C
- D. D
Explanation: The maximum displacement or distance moved by a point on a vibrating body or wave measured from its equilibrium position.
Correct answer: B- A. 1 : 1
- B. 1 : 4
- C. 2 : 1
- D. 1 : 2
Explanation: f1 = f2 v/2L1 = v/4L2 L1 : L2 = 2 : 1 The lengths of an organ pipe open at both ends and an organ pipe closed at one end will resonate…
Correct answer: 2 : 1- A. f/2
- B. 3f/4
- C. f
- D. 2f
Explanation: Explanation is given below. The correct answer is C) f. When the cylindrical tube is dipped in water so that half of it is submerged, the…
Correct answer: f- A. Increase in the velocity of sound
- B. Decrease in the velocity of sound
- C. Increase in frequency of sound
- D. Increase in both velocity and frequency of sound
Explanation: As per the dopplers equation When source is moving towards observor the velocity of source is substracted from the velocity of sound.
Correct answer: Increase in frequency of sound- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: Using the formula V = Fλ F = V/λ (V is constant) F ∝ 1/ λ Both have an inverse relation so. will have a curved decreasing gradient.
Correct answer: Option B1059. When an observer moves towards source with a velocity Uo, then the modified frequency 'fA' becomes:
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: As the observer is moving towards the source the speed of sound (V) and the velocity of observer Uo add up causing an increase in the…
Correct answer: Option C- A. Sometimes increases and sometimes decreases
- B. Remains constant
- C. Decrease
- D. Increase
Explanation: When a source of sound is moving toward a stationary observer, the pitch of the sound will increase.
Correct answer: Increase