JEE PHYSICS MCQ: WAVES

1 Medium

1 of 1

Application +4 | -1

A whistle with frequency

1020 \mathrm{~Hz}

is blown at a station. A man travelling in train moving towards the station at

30 \mathrm{~ms}^{-1}

hears the sound of the whistle. If the speed of sound is

340 \mathrm{~ms}^{-1}

, the apparent frequency heard by him is

View answer and explanation

Correct option: B

1110 \mathrm{~Hz}

Option B (

1110 \mathrm{~Hz}

) is correct because it is the apparent frequency calculated using the Doppler effect formula when the observer is moving towards the source.

More Questions from WAVES

Practice All Chapter MCQs →

3\,\,kHz

0.5

f\mathrm{ }Hz

V\mathrm{ }m/sec

0.2\,\,V

y = \frac{3}{{{{\left( {2x + 3t} \right)}^2} + 4}},

(– \mathrm{ve}) \,x

y = f(kx +\omega t),

X

0.01\,\,s

5 \mathrm{~m}

245 \mathrm{~g}

1 \mathrm{~kg}

g=980 \mathrm{~cm} \mathrm{~s}^{-2}

T

V