Doppler Effect
PHXI15:WAVES

354736 The engine of a train moving with speed \(10\;m{s^{ - 1}}\) towards a platform sounds a whistle at frequency \(400\;Hz\). The frequency heard by a passenger inside the train is (Neglect air speed. Speed of sound in air is \(330\;m{s^{ - 1}}\))

1 \(400\;Hz\)
2 \(388\;Hz\)
3 \(412\;Hz\)
4 \(200\;Hz\)
PHXI15:WAVES

354737 Two trains move towards each other with the same speed. Speed of sound is \(340\;m{s^{ - 1}}\). If the frequency of the tone of the whistle of one when heard on the other is \(9 / 8\) times the original value. Then the speed of each train is :
supporting img

1 \(40\;m{s^{ - 1}}\)
2 \(2 m s^{-1}\)
3 \(100\;m{s^{ - 1}}\)
4 \(20\,m{s^{ - 1}}\)
PHXI15:WAVES

354738 Two trains ' \(A\) ' and ' \(B\) ' are moving away from one another with a speed of \(720\,kmph\). The apparent frequency of the whistle blown by as heard by the passenger of the train ' \(B\) ' is (velocity of sound in air is \(350\;m{s^{ - 1}}\) ) (given whistle frequency \(1100\;Hz\))

1 \(300\;Hz\)
2 \(400\;Hz\)
3 \(500\;Hz\)
4 \(600\;Hz\)
PHXI15:WAVES

354739 A source of sound is in the middle of the line joining the position of two persons \(A\) and \(B\), air is blowing from \(B\) to \(A\). Then

1 \(A\) will hear first
2 \(B\) will hear first
3 Both will hear at a time
4 Sound is heard by neither \(A\) nor \(B\)
PHXI15:WAVES

354740 A police car moving at \(22\;m{\rm{/}}s\) chases a motorcyclist. The police man sounds his horn at \(176\;Hz\), while both of them move towards a stationary siren of frequency \(165\;Hz\). Calculate the speed of the motorcycle. If it is given that the motorcyclist does not observe any beats: (Given velocity of sound \(330\;m{\rm{/}}s\) )
supporting img

1 \(33\;m{\rm{/}}s\)
2 \(22\;m{\rm{/}}s\)
3 Zero
4 \(11\;m{\rm{/}}s\)
PHXI15:WAVES

354736 The engine of a train moving with speed \(10\;m{s^{ - 1}}\) towards a platform sounds a whistle at frequency \(400\;Hz\). The frequency heard by a passenger inside the train is (Neglect air speed. Speed of sound in air is \(330\;m{s^{ - 1}}\))

1 \(400\;Hz\)
2 \(388\;Hz\)
3 \(412\;Hz\)
4 \(200\;Hz\)
PHXI15:WAVES

354737 Two trains move towards each other with the same speed. Speed of sound is \(340\;m{s^{ - 1}}\). If the frequency of the tone of the whistle of one when heard on the other is \(9 / 8\) times the original value. Then the speed of each train is :
supporting img

1 \(40\;m{s^{ - 1}}\)
2 \(2 m s^{-1}\)
3 \(100\;m{s^{ - 1}}\)
4 \(20\,m{s^{ - 1}}\)
PHXI15:WAVES

354738 Two trains ' \(A\) ' and ' \(B\) ' are moving away from one another with a speed of \(720\,kmph\). The apparent frequency of the whistle blown by as heard by the passenger of the train ' \(B\) ' is (velocity of sound in air is \(350\;m{s^{ - 1}}\) ) (given whistle frequency \(1100\;Hz\))

1 \(300\;Hz\)
2 \(400\;Hz\)
3 \(500\;Hz\)
4 \(600\;Hz\)
PHXI15:WAVES

354739 A source of sound is in the middle of the line joining the position of two persons \(A\) and \(B\), air is blowing from \(B\) to \(A\). Then

1 \(A\) will hear first
2 \(B\) will hear first
3 Both will hear at a time
4 Sound is heard by neither \(A\) nor \(B\)
PHXI15:WAVES

354740 A police car moving at \(22\;m{\rm{/}}s\) chases a motorcyclist. The police man sounds his horn at \(176\;Hz\), while both of them move towards a stationary siren of frequency \(165\;Hz\). Calculate the speed of the motorcycle. If it is given that the motorcyclist does not observe any beats: (Given velocity of sound \(330\;m{\rm{/}}s\) )
supporting img

1 \(33\;m{\rm{/}}s\)
2 \(22\;m{\rm{/}}s\)
3 Zero
4 \(11\;m{\rm{/}}s\)
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
PHXI15:WAVES

354736 The engine of a train moving with speed \(10\;m{s^{ - 1}}\) towards a platform sounds a whistle at frequency \(400\;Hz\). The frequency heard by a passenger inside the train is (Neglect air speed. Speed of sound in air is \(330\;m{s^{ - 1}}\))

1 \(400\;Hz\)
2 \(388\;Hz\)
3 \(412\;Hz\)
4 \(200\;Hz\)
PHXI15:WAVES

354737 Two trains move towards each other with the same speed. Speed of sound is \(340\;m{s^{ - 1}}\). If the frequency of the tone of the whistle of one when heard on the other is \(9 / 8\) times the original value. Then the speed of each train is :
supporting img

1 \(40\;m{s^{ - 1}}\)
2 \(2 m s^{-1}\)
3 \(100\;m{s^{ - 1}}\)
4 \(20\,m{s^{ - 1}}\)
PHXI15:WAVES

354738 Two trains ' \(A\) ' and ' \(B\) ' are moving away from one another with a speed of \(720\,kmph\). The apparent frequency of the whistle blown by as heard by the passenger of the train ' \(B\) ' is (velocity of sound in air is \(350\;m{s^{ - 1}}\) ) (given whistle frequency \(1100\;Hz\))

1 \(300\;Hz\)
2 \(400\;Hz\)
3 \(500\;Hz\)
4 \(600\;Hz\)
PHXI15:WAVES

354739 A source of sound is in the middle of the line joining the position of two persons \(A\) and \(B\), air is blowing from \(B\) to \(A\). Then

1 \(A\) will hear first
2 \(B\) will hear first
3 Both will hear at a time
4 Sound is heard by neither \(A\) nor \(B\)
PHXI15:WAVES

354740 A police car moving at \(22\;m{\rm{/}}s\) chases a motorcyclist. The police man sounds his horn at \(176\;Hz\), while both of them move towards a stationary siren of frequency \(165\;Hz\). Calculate the speed of the motorcycle. If it is given that the motorcyclist does not observe any beats: (Given velocity of sound \(330\;m{\rm{/}}s\) )
supporting img

1 \(33\;m{\rm{/}}s\)
2 \(22\;m{\rm{/}}s\)
3 Zero
4 \(11\;m{\rm{/}}s\)
PHXI15:WAVES

354736 The engine of a train moving with speed \(10\;m{s^{ - 1}}\) towards a platform sounds a whistle at frequency \(400\;Hz\). The frequency heard by a passenger inside the train is (Neglect air speed. Speed of sound in air is \(330\;m{s^{ - 1}}\))

1 \(400\;Hz\)
2 \(388\;Hz\)
3 \(412\;Hz\)
4 \(200\;Hz\)
PHXI15:WAVES

354737 Two trains move towards each other with the same speed. Speed of sound is \(340\;m{s^{ - 1}}\). If the frequency of the tone of the whistle of one when heard on the other is \(9 / 8\) times the original value. Then the speed of each train is :
supporting img

1 \(40\;m{s^{ - 1}}\)
2 \(2 m s^{-1}\)
3 \(100\;m{s^{ - 1}}\)
4 \(20\,m{s^{ - 1}}\)
PHXI15:WAVES

354738 Two trains ' \(A\) ' and ' \(B\) ' are moving away from one another with a speed of \(720\,kmph\). The apparent frequency of the whistle blown by as heard by the passenger of the train ' \(B\) ' is (velocity of sound in air is \(350\;m{s^{ - 1}}\) ) (given whistle frequency \(1100\;Hz\))

1 \(300\;Hz\)
2 \(400\;Hz\)
3 \(500\;Hz\)
4 \(600\;Hz\)
PHXI15:WAVES

354739 A source of sound is in the middle of the line joining the position of two persons \(A\) and \(B\), air is blowing from \(B\) to \(A\). Then

1 \(A\) will hear first
2 \(B\) will hear first
3 Both will hear at a time
4 Sound is heard by neither \(A\) nor \(B\)
PHXI15:WAVES

354740 A police car moving at \(22\;m{\rm{/}}s\) chases a motorcyclist. The police man sounds his horn at \(176\;Hz\), while both of them move towards a stationary siren of frequency \(165\;Hz\). Calculate the speed of the motorcycle. If it is given that the motorcyclist does not observe any beats: (Given velocity of sound \(330\;m{\rm{/}}s\) )
supporting img

1 \(33\;m{\rm{/}}s\)
2 \(22\;m{\rm{/}}s\)
3 Zero
4 \(11\;m{\rm{/}}s\)
PHXI15:WAVES

354736 The engine of a train moving with speed \(10\;m{s^{ - 1}}\) towards a platform sounds a whistle at frequency \(400\;Hz\). The frequency heard by a passenger inside the train is (Neglect air speed. Speed of sound in air is \(330\;m{s^{ - 1}}\))

1 \(400\;Hz\)
2 \(388\;Hz\)
3 \(412\;Hz\)
4 \(200\;Hz\)
PHXI15:WAVES

354737 Two trains move towards each other with the same speed. Speed of sound is \(340\;m{s^{ - 1}}\). If the frequency of the tone of the whistle of one when heard on the other is \(9 / 8\) times the original value. Then the speed of each train is :
supporting img

1 \(40\;m{s^{ - 1}}\)
2 \(2 m s^{-1}\)
3 \(100\;m{s^{ - 1}}\)
4 \(20\,m{s^{ - 1}}\)
PHXI15:WAVES

354738 Two trains ' \(A\) ' and ' \(B\) ' are moving away from one another with a speed of \(720\,kmph\). The apparent frequency of the whistle blown by as heard by the passenger of the train ' \(B\) ' is (velocity of sound in air is \(350\;m{s^{ - 1}}\) ) (given whistle frequency \(1100\;Hz\))

1 \(300\;Hz\)
2 \(400\;Hz\)
3 \(500\;Hz\)
4 \(600\;Hz\)
PHXI15:WAVES

354739 A source of sound is in the middle of the line joining the position of two persons \(A\) and \(B\), air is blowing from \(B\) to \(A\). Then

1 \(A\) will hear first
2 \(B\) will hear first
3 Both will hear at a time
4 Sound is heard by neither \(A\) nor \(B\)
PHXI15:WAVES

354740 A police car moving at \(22\;m{\rm{/}}s\) chases a motorcyclist. The police man sounds his horn at \(176\;Hz\), while both of them move towards a stationary siren of frequency \(165\;Hz\). Calculate the speed of the motorcycle. If it is given that the motorcyclist does not observe any beats: (Given velocity of sound \(330\;m{\rm{/}}s\) )
supporting img

1 \(33\;m{\rm{/}}s\)
2 \(22\;m{\rm{/}}s\)
3 Zero
4 \(11\;m{\rm{/}}s\)