Question bank/JEE Main/Physics

A sound wave of frequency n travels horizontally to right. It is
reflected from a large vertical wall moving to the left with a speed V.
The speed of sound in medium is C. Then

Athe frequency of reflected wave for stationary listener isBthe frequency of reflected wave for stationary listener isCthe frequency of reflected wave for stationary listener isDthe number of beats heard by stationary listener to the left of
reflecting wall is [IMAGE]

Show answer and solution▾

[IMAGE] (number of waves striking the wall per sec)
[IMAGE] (frequency observed by stationary listener)
TOPIC:Sound waves
SUB TOPIC:Doppler effect
LEVEL:Moderate
2. In YDSE arrangement, white light is used to illuminate the slits. At
point on the screen directly in front of slits, which of these
wavelength is missing?
([IMAGE] = wavelength of light used)
(d = distance between slits)
(D = distance between slits and screen)
(given d << D)

Source: Grass-G / Ph-28 Physics paper FST 16 Jan.docx