NEET UG 2017 · Physics · Question 20
NEET 2017 Physics, question 20
Question 20 of the NEET 2017 paper (code A) is a Physics question from Waves. Its idea, Apparent Frequency: Both Source and Observer Moving, was asked only this once in NEET 2017–2026. The CBSE official answer key gives option 4.
Updated 2026-10-08
Q20 · Physics
Two cars moving in opposite directions approach each other with speed of 22 m/s and 16.5 m/s respectively. The driver of the first car blows a horn having a frequency 400 Hz. The frequency heard by the driver of the second car is [velocity of sound 340 m/s] :
- 1350 Hz
- 2361 Hz
- 3411 Hz
- 4448 HzOfficial answer
Official answer: option 4 · CBSE official answer key
Same idea
The only question on Apparent Frequency: Both Source and Observer Moving
No other NEET paper from 2017–2026 tested this exact idea.
Apparent Frequency: Both Source and Observer Moving: every question and how it was framed
The chapter
Waves in ten years of NEET
9 questions from 2017–2026, asked in 7 of 10 papers, about 0.9 a paper. Doppler Effect alone had 1.