Questions tagged 'Doppler Effect'

• Doppler shift in frequency does not depend upon
  Category: waves | Tags: Doppler Effect
• A source of sound of frequency 450 cycles/sec is moving towards a stationary observer with 34 m/sec speed. If the speed of sound is 340 m/sec, then the apparent frequency will be
  Category: waves | Tags: Doppler Effect
• The wavelength is 120 cm when the source is stationary. If the source is moving with relative velocity of 60 m/sec towards the observer, then the wavelength of the sound wave reaching to the observer will be (velocity of sound = 330 m/s)
  Category: waves | Tags: Doppler Effect
• The frequency of a whistle of an engine is 600 cycles/sec is moving with the speed of 30 m/sec towards an observer. The apparent frequency will be (velocity of sound = 330 m/s)
  Category: waves | Tags: Doppler Effect
• A source of sound emits waves with frequency f Hz and speed V m/sec. Two observers move away from this source in opposite directions each with a speed 0.2 V relative to the source. The ratio of frequencies heard by the two observers will be
  Category: waves | Tags: Doppler Effect
• The source producing sound and an observer both are moving along the direction of propagation of sound waves. If the respective velocities of sound, source and an observer are v, ${{v}_{s}}$ and ${{v}_{o}}$, then the apparent frequency heard by the observer will be (n = frequency of sound)
  Category: waves | Tags: Doppler Effect
• An observer moves towards a stationary source of sound of frequency n. The apparent frequency heard by him is 2n. If the velocity of sound in air is 332 m/sec, then the velocity of the observer is
  Category: waves | Tags: Doppler Effect
• An observer is moving towards the stationary source of sound, then
  Category: waves | Tags: Doppler Effect
• A whistle sends out 256 waves in a second. If the whistle approaches the observer with velocity 1/3 of the velocity of sound in air, the number of waves per second the observer will receive
  Category: waves | Tags: Doppler Effect
• A person feels 2.5% difference of frequency of a motor-car horn. If the motor-car is moving to the person and the velocity of sound is 320 m/sec, then the velocity of car will be
  Category: waves | Tags: Doppler Effect

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