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Doppler Effect for NEET: 14 solved questions

Real NEET paper questions on doppler effect, part of waves. Each opens with the options, the correct answer and a step-by-step solution. Papers run from 1991 to 2017. No sign-in needed to read them.

What this topic asks

• Moving source or observer — 5 questions
• Echo from a reflector — 4 questions
• Source moving at an angle — 3 questions
• Beats heard by a moving listener — 2 questions

All 14 questions with solutions

• Two cars moving in opposite directions approach each other with speed of 22 m s⁻¹ and 16.5 m s⁻¹ respectively… NEET 2017
• A siren emitting a sound of frequency 800 Hz moves away from an observer towards a cliff at a speed of 15 m s… NEET 2016 Phase-I
• A source of sound S emitting waves of frequency 100 Hz and an observer O are located at some distance from ea… NEET 2015
• A speeding motorcyclist sees traffic jam ahead of him. He slows down to 36 km h⁻¹. He finds that traffic has… NEET 2014
• Two sources P and Q produce notes of frequency 660 Hz each. A listener moves from P to Q with a speed of 1 m… NEET 2013 Karnataka
• A train moving at a speed of 220 m s⁻¹ towards a stationary object, emits a sound of frequency 1000 Hz. Some… NEET 2012 Mains
• The driver of a car travelling with speed 30 m/sec towards a hill sounds a horn of frequency 600 Hz. If the v… NEET 2009
• A car is moving towards a high cliff. The driver sounds a horn of frequency f. The reflected sound heard by t… NEET 2004
• An observer moves towards a stationary source of sound with a speed 1/5th of the speed of sound. The waveleng… NEET 2003
• A whistle revolves in a circle with angular speed ω=20 rad/s using a string of length 50 cm. If the frequency… NEET 2002
• Two stationary sources each emitting waves of wavelength λ, an observer moves from one source to another with… NEET 2000
• A vehicle, with a horn of frequency n is moving with a velocity of 30 m/s in a direction perpendicular to the… NEET 1998
• A star, which is emitting radiation at a wavelength of 5000 A, is approaching the earth with a velocity of 1.… NEET 1995
• Two trains move towards each other with the same speed. The speed of sound is 340 m/s. If the height of the t… NEET 1991