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 7 of 65
- A. Refraction.
- B. Diffraction.
- C. Interference.
- D. Polarisation.
Explanation: The correct answer is polarisation. Polarisation is a property of transverse waves, where the oscillations occur in a particular direction…
Correct answer: Polarisation.- A. light
- B. water waves
- C. expanding galaxies
- D. electromagnetic waves
Explanation: C) Expanding galaxies: The Doppler effect is a fundamental tool in astronomy.
Correct answer: expanding galaxies- A. Transverse wave
- B. Longitudinal wave
- C. Standing wave
- D. shock wave
Explanation: Longitudinal waves are those waves in which particles of the disturbed medium move parallel to the direction of propagation of the wave.
Correct answer: Transverse wave- A. Longitudinal wave
- B. Stationary wave
- C. Superimposed wave
- D. Transverse wave
Explanation: Only transverse waves can be polarised. Longitudinal waves cannot be polarised.Transverse: vibrations perpendicular to the direction of…
Correct answer: Transverse wave- A. Observed frequency is greater than original frequency
- B. Observed frequency is less than original frequency
- C. Observed frequency is equal to original frequency
- D. Observed frequency is independent of original frequency
Explanation: As the listener moves towards a stationary source, the apparent frequency heard by the listener increases, while the original frequency of…
Correct answer: Observed frequency is greater than original frequency- A. 1200
- B. 1400
- C. 1600
- D. 1800
- E. 4800
Explanation: We know that The intensity of a wave is directly proportional to the square of its amplitude Mathematically-> I x a2HereI = intensitya =…
Correct answer: 4800- A. 2π
- B. 2.5π
- C. 3π
- D. 1π
Explanation: λ= 20cm = 0.2 mΦ= ?Δd = 25 cm = 0.25 mΦ= kΔd k is wave number [ k = 2π/λ]Φ=2π/λΔd= 2π/0.2 *0.25 = 2.5 π
Correct answer: 2.5π- A. Wavelength decreases and speed does not change
- B. Wavelength increases and speed does not change
- C. Wavelength increases and speed increases
- D. Wavelength increases and speed decreases
Explanation: According to wave equation: v = f ƛ Here , ƛ = v/f As the source moves away from observer , the frequency decrease and speed of sound is…
Correct answer: Wavelength increases and speed does not change- A. π/4
- B. π/2
- C. 0
- D. 2π
Explanation: When a wave is reflected from a denser medium to a rarer medium, the wave does not experience a phase change; thus, the correct answer is…
Correct answer: 0- A. Crests and troughs
- B. Compression and rarefactions
- C. Crests and compressions
- D. Troughs and rarefactions
Explanation: A longitudinal wave consists of compressions and rarefactions. Compressions are regions of high pressure and density, while rarefactions…
Correct answer: Compression and rarefactions- A. 20 N
- B. 22 kgm/s²
- C. 24 kgm/s²
- D. 28 N
Explanation: The reading on the spring balance in a lift includes both the force due to gravity and the apparent weight due to the acceleration of the…
Correct answer: 24 kgm/s²- A. remain the same:
- B. increase:
- C. decrease
- D. B, C
Explanation: When only a little mercury is drained from the initially full sphere, the centre of gravity of the remaining mercury shifts downward, so…
Correct answer: increase:- A. Driven harmonic oscillator:
- B. Forced harmonic oscillator:
- C. Simple harmonic oscillators
- D. both a & b
Explanation: Explanation: Both "Driven harmonic oscillator" and "Forced harmonic oscillator" are terminologies used to describe physical systems…
Correct answer: both a & b- A. K.E:
- B. P.E:
- C. zero
- D. both K.E and P.E
Explanation: Explanation: At the mean position of a simple harmonic motion, the kinetic energy (K.E) is maximum and the potential energy (P.E) is also…
Correct answer: both K.E and P.E- A. 2 sec
- B. 2 min
- C. 0.5 Hz
- D. 2.5 sec
Explanation: A second's pendulum has a period of exactly 2 seconds. The frequency (f) of a pendulum is the reciprocal of its period (T), so the…
Correct answer: 0.5 Hz- A. Sine wave
- B. Square wave
- C. Sawtooth wave
- D. Rectangular wave
Explanation: The waveform of Simple Harmonic Motion (S.H.M) is a sine wave. This is because the displacement of the particle executing S.H.M.
Correct answer: Sine wave- A. Electrical
- B. Mechanical
- C. Free
- D. All of these
Explanation: Tuning a radio matches the receiver circuit's natural frequency to the frequency of the incoming signal - an example of electrical…
Correct answer: Electrical- A. Mass of pendulum
- B. Momentum of pendulum
- C. Acceleration of pendulum
- D. Velocity of pendulum
Explanation: The mass of the pendulum remains constant throughout its motion. It does not become zero at any point during the oscillation.
Correct answer: Mass of pendulum- A. Velocity time
- B. Distance time
- C. Acceleration
- D. Amplitude frequency
Explanation: In a heavily damped system, the amplitude of the oscillation decreases rapidly, leading to a fairly flat resonance curve in distance or…
Correct answer: Distance time- A. x0
- B. 2x0
- C. 4x0
- D. Zero
Explanation: In one complete period of Simple Harmonic Motion (S.H.M), the displacement returns to its initial position.
Correct answer: Zero