A train has just completed a U-curve in a track which is a semicircle. The engine is at forward ...

Channel:
PW Solutions
Subscribers:
451,000
Published on ● Video Link: https://www.youtube.com/watch?v=NsKmOwdsJls


Duration: 6:06
35 views
0

A train has just completed a U-curve in a track which is a semicircle. The engine is at forward end of the semicircular part of the track while the last carriage is at the rear
\( \mathrm{P} \) end of the semi-circular track. The driver blows a whistle of frequency \( 200 \mathrm{~Hz} \). Velocity of sound is \( 340 \mathrm{~m} / \mathrm{s} \). Then the apparent frequency as observed by a
W. passenger in the middle of the train, when the need of the train is \( 30 \mathrm{~m} / \mathrm{s} \) is
(A) \( 219 \mathrm{~Hz} \)
(B) \( 288 \mathrm{~Hz} \)
(C) \( 200 \mathrm{~Hz} \)
(D) \( 181 \mathrm{~Hz} \)
šŸ“²PW App Link - https://bit.ly/YTAI_PWAP
šŸŒPW Website - https://www.pw.live



Other Videos By PW Solutions


2022-12-02In normal cases thin stream of water bends toward a negatively charged rod. When a positively ch...
2022-12-02Two charged bodies A and B exert repulsive forces on each other. If charge on \( \mathrm{A} \) i...
2022-12-02Two waves represented by \( y 1=10 \sin (2000 \pi t+2 x) \) and \( y_{2}=10 \sin (2000 \pi t+2 x...
2022-12-02A piano string \( 1.5 \mathrm{~m} \) long is made of steel of density \( 7.7 \times 10^{3} \math...
2022-12-02An open organ pipe filled with air has a fundamental frequency \( 500 \mathrm{~Hz} \). The first...
2022-12-02A source of sound emitting a note of frequency \( 200 \mathrm{~Hz} \) moves towards an observer ...
2022-12-02The speed of sound through oxygen at \( \mathrm{T} \mathrm{K} \) is \( (300 \mathrm{~m} / \mathr...
2022-12-02Standing wave is formed in string between two fixed ends. If separation between two consecutive ...
2022-12-02An accurate and reliable audio oscillator is used to standardise a tuning fork. When the oscilla...
2022-12-02A standing wave having three antinodes and four nodes is formed between two atoms having a dista...
2022-12-02A train has just completed a U-curve in a track which is a semicircle. The engine is at forward ...
2022-12-02Two identical sounds A and B reach a point in the same phase. The resultant sound is \( \mathrm{...
2022-12-02Two waves represented by \( y_{1}=10 \sin (2000 \pi t+2 x) \) and \( y_{2}=10 \sin (2000 \pi t+2...
2022-12-02In a mixture of gases, the average number of degrees of freedom per molecule is 6 . The rms spee...
2022-12-02A steel rod having a length of \( 1 \mathrm{~m} \) is fastened at its middle. Assuming young's m...
2022-12-02A tuning fork of frequency \( 480 \mathrm{~Hz} \) resonates with a tube closed at one end of len...
2022-12-02The first overtone of a pipe closed at one end resonates with the third harmonic of a string fix...
2022-12-02Find the intensity of sound wave whose frequency is \( 250 \mathrm{~Hz} \). The displacement amp...
2022-12-02The loudness level at a distance \( \mathrm{R} \) from a long linear source of sound is found to...
2022-12-02Two strings A and B with \( \mu=2 \mathrm{~kg} / \mathrm{m} \) and \( \mu=8 \mathrm{~kg} / \math...
2022-12-02A string fixed at both ends is vibrating in the lowest mode of vibration for which a point at qu...


Tags:
pw