New chat PYQ Library Doubts Rank report

Sign in to see Recents

Sign in to save progress →

Waves question

2007 · Shift 2 · Q24

Guest · try one question or challengeGuest · try one question or challenge

PYQ Library
JEE Advanced
Physics
Waves
2007 · Shift 2 · Q24

Waves question

2007 · Shift 2 · Q24

JEE AdvancedPhysicsWavesMCQ+3 / −1

Two trains

A

and

B

are moving with speeds

20 \mathrm{~m} / \mathrm{s}

and

30 \mathrm{~m} / \mathrm{s}

respectively in the same direction on the same straight track, with

B

ahead of

A

. The engines are at the front ends. The engines of train A blows a long whistle. Assume that the sound of the whistle is composed of components varying in frequency from

f_{1}=800 \mathrm{~Hz}

to

f_{2}=1120 \mathrm{~Hz}

, as shown in the figure. The spread in the frequency (highest frequency - lowest frequency) is thus

320 \mathrm{~Hz}

. The speed of sound in still air is

340 \mathrm{~m} / \mathrm{s}

.

IIT-JEE 2007 Paper 2 Offline Physics - Waves Question 10 English Comprehension

The spread of frequency as observed by the passengers in train B is

A
310 Hz
B
330 Hz
C
350 Hz
D
290 Hz

More from Waves

Column I describe some situations in which a small object moves. Column II describes some characteristics of these motions. Match the situation in Column I with the characteristics in Column II and indicate your answer by darkening… Includes table2007 · MCQ
An audio transmitter $(T)$ and a receiver $(R)$ are hung vertically from two identical massless strings of length 8 m with their pivots well separated along the $X$ axis. They are pulled from the equilibrium position in opposite directions… Includes diagram2025 · Numerical
Two uniform strings of mass per unit length $L$ and $2 L$ , and length $O$ and $P$ , respectively, are joined at point $O$ , and tied at two fixed ends $P$ and $Q$ , as shown in the figure. The strings are… Includes diagram2024 · Multiple correct
A source (S) of sound has frequency $240 Hz$ . When the observer (O) and the source move towards each other at a speed $v$ with respect to the ground (as shown in Case 1 in the figure), the observer measures the frequency of the… Includes diagram2024 · Numerical
A string of length $1 m$ and mass $2 \times 1 0^{- 5} kg$ is under tension $T$ . When the string vibrates, two successive harmonics are found to occur at frequencies $750 Hz$ and $1000 Hz$ . The value of…2023 · Numerical
$S_{1}$ and $S_{2}$ are two identical sound sources of frequency $656 Hz$ . The source $S_{1}$ is located at $O$ and $S_{2}$ moves anti-clockwise with a uniform speed $42 m s^{- 1}$ on a circular path around… Includes diagram2023 · Numerical
$S_{1}$ and $S_{2}$ are two identical sound sources of frequency $656 Hz$ . The source $S_{1}$ is located at $O$ and $S_{2}$ moves anti-clockwise with a uniform speed $42 m s^{- 1}$ on a circular path around… Includes diagram2023 · Numerical
A source, approaching with speed u towards the open end of a stationary pipe of length L, is emitting a sound of frequency fs. The farther end of the pipe is closed. The speed of sound in air is v and f0 is the fundamental frequency of the…2021 · Multiple correct