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 45 of 65
- A. 400 HZ
- B. 100 HZ
- C. 120 HZ
- D. 180 HZ
Explanation: Given: Speed of sound = Vs = 340 ms-1 Speed of aeroplane = Va = 0.5 × 340 = 170 ms-1 Frequency = f = 200 Hz Frequency = f ' = ?
Correct answer: 400 HZ882. If the wavelength of light coming from a galaxy shifts towards the red end of space then galaxy is:
- A. Approaching Earth
- B. Receding the Earth
- C. Stationary
- D. Approaching Earth or is stationary
Explanation: If the wavelength of light coming from a galaxy shifts towards the red end of the spectrum, it indicates that the galaxy is receding from…
Correct answer: Receding the Earth- A. Displacement
- B. Amplitude
- C. Wavelength
- D. Frequency
Explanation: The shortest distance between any two points in phase on a wave is called wavelength.
Correct answer: Wavelength- A. Electric and magnetic fields
- B. Coil of springs
- C. Ropes
- D. Water
Explanation: Mechanical waves are not generated by electric and magnetic fields. Mechanical waves, such as sound waves, require a physical medium to…
Correct answer: Electric and magnetic fields- A. 1Hz,2Hz,3Hz
- B. 2Hz,4Hz,6Hz
- C. 3Hz,6Hz,9Hz
- D. 5Hz,10Hz,15Hz
Explanation: For a string, the formula for fundamental frequency is F=nv/2l By putting values F=24/2(6)=2 HZ The overtones are: F=2(2)=4Hz F=2(3)=6Hz
Correct answer: 2Hz,4Hz,6Hz- A. Zeeman effect
- B. Starkeffect
- C. Doppler effect
- D. Compton effect
Explanation: An increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move towards (or away from) each…
Correct answer: Doppler effect- A. T=vf
- B. 1f=v+T
- C. 1f=1/T
- D. T=v/T
Explanation: Time period (T) is the amount of time an oscillating body takes to repeat itself, and Frequency (f or ν) is the number of times it repeats…
Correct answer: 1f=1/T- A. distance between two consecutive crests
- B. distance between two alternate crest
- C. distance between two alternate rough
- D. distance between two crest and two trough
Explanation: Distance between two consecutive crests (or troughs) is the definition of wavelength.
Correct answer: distance between two consecutive crests- A. pressure
- B. density
- C. temperature
- D. medium
Explanation: Pressure has no effect on speed of sound in air.
Correct answer: pressure- A. 20 hz
- B. 20k Hz
- C. 200 k Hz
- D. 2000 kHz
Explanation: Ultrasonic refers to sound having a frequency higher than the upper audible limit of human hearing. It has a frequency above 20,000 Hz.
Correct answer: 20k Hz- A. 0.61 m/s
- B. 0.51 m/s
- C. 0.41 m/s
- D. 0.31 m/s
Explanation: According to the formula, Vt= V0+0.61*t The value 0.61 is constantly increased with each degree increase in temperature.
Correct answer: 0.61 m/s- A. complex wave
- B. stationary wave
- C. electromagnetic wave
- D. periodic waves
Explanation: Wave is in the form of a pulse which is set up by a single disturbance in a medium like the snapping of one end of a rope or a coil…
Correct answer: periodic waves- A. Solids
- B. Liquids
- C. Gases
- D. Plasma
Explanation: Longitudinal waves are waves in which the particles of the medium vibrate parallel to the direction of wave propagation.
Correct answer: Solids- A. Frequency
- B. Time period
- C. Wavelength
- D. Wavenumber
Explanation: Frequency means the no. of vibrations occuring in one second.Time period is the time required to complete one cycle/vibrations.Wavelength…
Correct answer: Wavelength- A. Moist air is heavier than dry air
- B. Value of gamma is more for moist air
- C. Density of moist air is less than density of dry air
- D. Density of moist air is more than density of dry air
Explanation: The speed of sound in dry air is 340m/s whereas the speed of sound in moist air is 346m/s.
Correct answer: Density of moist air is less than density of dry air- A. Energy
- B. Mass
- C. Both energy and mass
- D. Momentum
Explanation: FOR ENERGY:There is no energy transport in a standing wave because the two waves that make them up carry equal energy in opposite…
Correct answer: Both energy and mass- A. Refleetion
- B. Diffraction
- C. Polarization
- D. Interference
- E. Refraction
Explanation: Polarization refers to the orientation of the oscillations of a wave, typically applied to electromagnetic waves like light.
Correct answer: Polarization- A. Electromagnetic waves
- B. De Broglie waves
- C. Mechanical waves
- D. Particle waves
- E. Matter waves
Explanation: Mechanical waves are waves that require a medium (solid, liquid, or gas) to propagate.
Correct answer: Mechanical waves- A. Amplitude of vibration is zero.
- B. Do not move along the string.
- C. Produced at the fixed ends of strings
- D. The distance between consecutive nodes is 1 wavelength.
Explanation: Incorrect, the distance between consecutive nodes is half a wavelength (λ/2), not a full wavelength.
Correct answer: The distance between consecutive nodes is 1 wavelength.- A. Wave front
- B. Wave crest
- C. Wave trough
- D. Wavelength
Explanation: A wave crest is the highest point of a wave. In ocean waves, it's where the water rises before it breaks and crashes back down.
Correct answer: Wave crest