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

Channel:
PW Solutions
Subscribers:
445,000
Published on ● Video Link: https://www.youtube.com/watch?v=UYlpFQvEncU


Duration: 6:06
8 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) \( 181 \mathrm{~Hz} \)
📲PW App Link - https://bit.ly/YTAI_PWAP
🌐PW Website - https://www.pw.live



Other Videos By PW Solutions


2022-12-13Two point charge of \( 100 \mu \mathrm{C} \) and \( -4 \mu \mathrm{C} \) are positioned at point...
2022-12-13Three charges \( +\mathrm{q},+2 \mathrm{q} \) and \( +4 \mathrm{q} \) are connected by strings a...
2022-12-13A standing wave having three antinodes and four nodes is formed between two atoms having a dista...
2022-12-13Two charged bodies A and B exert repulsive forces on each other. If charge on \( \mathrm{A} \) i...
2022-12-13An accurate and reliable audio oscillator is used to standardise a tuning fork. When the oscilla...
2022-12-13Two waves represented by \( y 1=10 \sin (2000 \pi t+2 x) \) and \( y_{2}=10 \sin (2000 \pi t+2 x...
2022-12-13Standing wave is formed in string between two fixed ends. If separation between two consecutive ...
2022-12-13A piano string \( 1.5 \mathrm{~m} \) long is made of steel of density \( 7.7 \times 10^{3} \math...
2022-12-13A source of sound emitting a note of frequency \( 200 \mathrm{~Hz} \) moves towards an observer ...
2022-12-13The speed of sound through oxygen at \( \mathrm{T} \mathrm{K} \) is \( (300 \mathrm{~m} / \mathr...
2022-12-13A train has just completed a U-curve in a track which is a semicircle. The engine is at forward ...
2022-12-13A transverse wave is described by the equation \( y=y_{0} \sin 2 \pi(\mathrm{ft}-\mathrm{x} / \m...
2022-12-13\( \mathrm{A}, \mathrm{B} \) and \( \mathrm{C} \) are three tuning forks. Frequency of \( \mathr...
2022-12-13Two waves represented by \( y_{1}=10 \sin (2000 \pi t+2 x) \) and \( y_{2}=10 \sin (2000 \pi t+2...
2022-12-13A steel rod having a length of \( 1 \mathrm{~m} \) is fastened at its middle. Assuming young's m...
2022-12-13The first overtone of a pipe closed at one end resonates with the third harmonic of a string fix...
2022-12-13A tuning fork of frequency \( 480 \mathrm{~Hz} \) resonates with a tube closed at one end of len...
2022-12-13The loudness level at a distance \( \mathrm{R} \) from a long linear source of sound is found to...
2022-12-13In a mixture of gases, the average number of degrees of freedom per molecule is 6 . The rms spee...
2022-12-13Two identical sounds A and B reach a point in the same phase. The resultant sound is \( \mathrm{...
2022-12-13A string fixed at both ends is vibrating in the lowest mode of vibration for which a point at qu...


Tags:
pw