TG EAPCET 2024 (Online) 9th May Morning Shift | Waves Question 9 | Physics

A car travelling at a speed of 54 kmph towards a wall sounds horn of frequency 400 Hz . The difference in the frequencies of two sounds, one received directly from the car and other reflected from the wall noticed by a person standing between the car and the wall is (speed of sound in air is $335 \mathrm{~m} / \mathrm{s}$ )

35.9 Hz

20 Hz

70 Hz

zero

TG EAPCET 2024 (Online) 9th May Morning Shift

MCQ (Single Correct Answer)

-0

The speed of a transverse wave in a stretched string $A$ is $v$. Another string $B$ of same length and same radius is subjected to same tension. If the density of the material of the string $B$ is $2 \%$ more than that of $A$ then the speed of the transverse wave in string $B$ is

$\sqrt{1.04} \mathrm{~V}$

$\sqrt{1.02} \mathrm{~V}$

$\frac{v}{\sqrt{1.04}}$

$\frac{v}{\sqrt{1.02}}$

TS EAMCET 2023 (Online) 12th May Evening Shift

MCQ (Single Correct Answer)

-0

A rod of length $L$ and negligible mass is suspended by two identical strings $A B$ and $C D$ as shown in the figure A mass $M$ is suspended from point $O$ which is at a distance $x$ from $B$. If the frequency of the first harmonic of $A B$ is equal to the frequency of the second harmonic of $C D$, then the value of $x$ is

TS EAMCET 2023 (Online) 12th May Evening Shift Physics - Waves Question 1 English

$\frac{L}{5}$

$\frac{2 L}{7}$

$\frac{3 L}{10}$

$\frac{L}{g}$

TS EAMCET 2023 (Online) 12th May Evening Shift

MCQ (Single Correct Answer)

-0

An observer moves towards a stationary source of sound with a speed $\frac{1}{5}$ th that of sound. The frequency of ${ }^{\text {th }}$ sound emitted by the source of $f$. The apparent frequency recorded by the observer is

$1.2 f$

$f$

$0.8 f$

$2 f$

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