Doppler Effect
PHXI15:WAVES

354693 A toy-car, blowing its horn, is moving with a steady speed of \(5\;m/s\), away from a wall. An observer, towards whom the toy car is moving, is able to hear 5 beats per second. If the velocity of sound in air is \(340\;m/s\), the frequency of the horn of the toy car is close to :

1 \(680\;Hz\)
2 \(510\;Hz\)
3 \(340\;Hz\)
4 \(170\;Hz\)
PHXI15:WAVES

354694 A bat flies at a steady speed of \(4\;m\;{s^{ - 1}}\) emitting a sound of \(f=90 \times 10^{3}\). It is flying horizon tally towards a vertical wall. The frequency of the reflected sound as detected by the bat will be (Take velocity of sound in air as \(330\;m\;{s^{ - 1}}\) )

1 \(88.1 \times {10^3}\;Hz\)
2 \(87.1 \times {10^3}\;Hz\)
3 \(92.2 \times {10^3}\;Hz\)
4 \(89.1 \times {10^3}\;Hz\)
PHXI15:WAVES

354695 The driver of a car travelling with speed \(30\;m{s^{ - 1}}\) towards a hill sounds a horn of frequency \(600\;Hz\). If the velocity of sound in air is \(330\;m{s^{ - 1}}\), the frequency of reflected sound as heard by driver is

1 \(550\;Hz\)
2 \(555.5\;Hz\)
3 \(720\;Hz\)
4 \(500\;Hz\)
PHXI15:WAVES

354696 A tuning fork of frequency \(380\;Hz\) is moving towards a wall with a velocity of \(4\;m/s\). Then the number of beats heard by a stationary listener between direct and reflected sounds will be:(velocity of sound in air is \(340\;m/s\) )
supporting img

1 \(5\)
2 \(0\)
3 \(10\)
4 \(7\)
PHXI15:WAVES

354697 A motor car blowing a horn of frequency \(124\,Hz\) moves with a velocity \(72\;km/hr\) towards a tall wall. The frequency of the refelected sound heard by the driver will be (velocity of sound in air is \(330\;m/s)\)

1 \(132\,Hz\)
2 \(109\,Hz\)
3 \(248\,Hz\)
4 \(140\,Hz\)
PHXI15:WAVES

354693 A toy-car, blowing its horn, is moving with a steady speed of \(5\;m/s\), away from a wall. An observer, towards whom the toy car is moving, is able to hear 5 beats per second. If the velocity of sound in air is \(340\;m/s\), the frequency of the horn of the toy car is close to :

1 \(680\;Hz\)
2 \(510\;Hz\)
3 \(340\;Hz\)
4 \(170\;Hz\)
PHXI15:WAVES

354694 A bat flies at a steady speed of \(4\;m\;{s^{ - 1}}\) emitting a sound of \(f=90 \times 10^{3}\). It is flying horizon tally towards a vertical wall. The frequency of the reflected sound as detected by the bat will be (Take velocity of sound in air as \(330\;m\;{s^{ - 1}}\) )

1 \(88.1 \times {10^3}\;Hz\)
2 \(87.1 \times {10^3}\;Hz\)
3 \(92.2 \times {10^3}\;Hz\)
4 \(89.1 \times {10^3}\;Hz\)
PHXI15:WAVES

354695 The driver of a car travelling with speed \(30\;m{s^{ - 1}}\) towards a hill sounds a horn of frequency \(600\;Hz\). If the velocity of sound in air is \(330\;m{s^{ - 1}}\), the frequency of reflected sound as heard by driver is

1 \(550\;Hz\)
2 \(555.5\;Hz\)
3 \(720\;Hz\)
4 \(500\;Hz\)
PHXI15:WAVES

354696 A tuning fork of frequency \(380\;Hz\) is moving towards a wall with a velocity of \(4\;m/s\). Then the number of beats heard by a stationary listener between direct and reflected sounds will be:(velocity of sound in air is \(340\;m/s\) )
supporting img

1 \(5\)
2 \(0\)
3 \(10\)
4 \(7\)
PHXI15:WAVES

354697 A motor car blowing a horn of frequency \(124\,Hz\) moves with a velocity \(72\;km/hr\) towards a tall wall. The frequency of the refelected sound heard by the driver will be (velocity of sound in air is \(330\;m/s)\)

1 \(132\,Hz\)
2 \(109\,Hz\)
3 \(248\,Hz\)
4 \(140\,Hz\)
PHXI15:WAVES

354693 A toy-car, blowing its horn, is moving with a steady speed of \(5\;m/s\), away from a wall. An observer, towards whom the toy car is moving, is able to hear 5 beats per second. If the velocity of sound in air is \(340\;m/s\), the frequency of the horn of the toy car is close to :

1 \(680\;Hz\)
2 \(510\;Hz\)
3 \(340\;Hz\)
4 \(170\;Hz\)
PHXI15:WAVES

354694 A bat flies at a steady speed of \(4\;m\;{s^{ - 1}}\) emitting a sound of \(f=90 \times 10^{3}\). It is flying horizon tally towards a vertical wall. The frequency of the reflected sound as detected by the bat will be (Take velocity of sound in air as \(330\;m\;{s^{ - 1}}\) )

1 \(88.1 \times {10^3}\;Hz\)
2 \(87.1 \times {10^3}\;Hz\)
3 \(92.2 \times {10^3}\;Hz\)
4 \(89.1 \times {10^3}\;Hz\)
PHXI15:WAVES

354695 The driver of a car travelling with speed \(30\;m{s^{ - 1}}\) towards a hill sounds a horn of frequency \(600\;Hz\). If the velocity of sound in air is \(330\;m{s^{ - 1}}\), the frequency of reflected sound as heard by driver is

1 \(550\;Hz\)
2 \(555.5\;Hz\)
3 \(720\;Hz\)
4 \(500\;Hz\)
PHXI15:WAVES

354696 A tuning fork of frequency \(380\;Hz\) is moving towards a wall with a velocity of \(4\;m/s\). Then the number of beats heard by a stationary listener between direct and reflected sounds will be:(velocity of sound in air is \(340\;m/s\) )
supporting img

1 \(5\)
2 \(0\)
3 \(10\)
4 \(7\)
PHXI15:WAVES

354697 A motor car blowing a horn of frequency \(124\,Hz\) moves with a velocity \(72\;km/hr\) towards a tall wall. The frequency of the refelected sound heard by the driver will be (velocity of sound in air is \(330\;m/s)\)

1 \(132\,Hz\)
2 \(109\,Hz\)
3 \(248\,Hz\)
4 \(140\,Hz\)
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
PHXI15:WAVES

354693 A toy-car, blowing its horn, is moving with a steady speed of \(5\;m/s\), away from a wall. An observer, towards whom the toy car is moving, is able to hear 5 beats per second. If the velocity of sound in air is \(340\;m/s\), the frequency of the horn of the toy car is close to :

1 \(680\;Hz\)
2 \(510\;Hz\)
3 \(340\;Hz\)
4 \(170\;Hz\)
PHXI15:WAVES

354694 A bat flies at a steady speed of \(4\;m\;{s^{ - 1}}\) emitting a sound of \(f=90 \times 10^{3}\). It is flying horizon tally towards a vertical wall. The frequency of the reflected sound as detected by the bat will be (Take velocity of sound in air as \(330\;m\;{s^{ - 1}}\) )

1 \(88.1 \times {10^3}\;Hz\)
2 \(87.1 \times {10^3}\;Hz\)
3 \(92.2 \times {10^3}\;Hz\)
4 \(89.1 \times {10^3}\;Hz\)
PHXI15:WAVES

354695 The driver of a car travelling with speed \(30\;m{s^{ - 1}}\) towards a hill sounds a horn of frequency \(600\;Hz\). If the velocity of sound in air is \(330\;m{s^{ - 1}}\), the frequency of reflected sound as heard by driver is

1 \(550\;Hz\)
2 \(555.5\;Hz\)
3 \(720\;Hz\)
4 \(500\;Hz\)
PHXI15:WAVES

354696 A tuning fork of frequency \(380\;Hz\) is moving towards a wall with a velocity of \(4\;m/s\). Then the number of beats heard by a stationary listener between direct and reflected sounds will be:(velocity of sound in air is \(340\;m/s\) )
supporting img

1 \(5\)
2 \(0\)
3 \(10\)
4 \(7\)
PHXI15:WAVES

354697 A motor car blowing a horn of frequency \(124\,Hz\) moves with a velocity \(72\;km/hr\) towards a tall wall. The frequency of the refelected sound heard by the driver will be (velocity of sound in air is \(330\;m/s)\)

1 \(132\,Hz\)
2 \(109\,Hz\)
3 \(248\,Hz\)
4 \(140\,Hz\)
PHXI15:WAVES

354693 A toy-car, blowing its horn, is moving with a steady speed of \(5\;m/s\), away from a wall. An observer, towards whom the toy car is moving, is able to hear 5 beats per second. If the velocity of sound in air is \(340\;m/s\), the frequency of the horn of the toy car is close to :

1 \(680\;Hz\)
2 \(510\;Hz\)
3 \(340\;Hz\)
4 \(170\;Hz\)
PHXI15:WAVES

354694 A bat flies at a steady speed of \(4\;m\;{s^{ - 1}}\) emitting a sound of \(f=90 \times 10^{3}\). It is flying horizon tally towards a vertical wall. The frequency of the reflected sound as detected by the bat will be (Take velocity of sound in air as \(330\;m\;{s^{ - 1}}\) )

1 \(88.1 \times {10^3}\;Hz\)
2 \(87.1 \times {10^3}\;Hz\)
3 \(92.2 \times {10^3}\;Hz\)
4 \(89.1 \times {10^3}\;Hz\)
PHXI15:WAVES

354695 The driver of a car travelling with speed \(30\;m{s^{ - 1}}\) towards a hill sounds a horn of frequency \(600\;Hz\). If the velocity of sound in air is \(330\;m{s^{ - 1}}\), the frequency of reflected sound as heard by driver is

1 \(550\;Hz\)
2 \(555.5\;Hz\)
3 \(720\;Hz\)
4 \(500\;Hz\)
PHXI15:WAVES

354696 A tuning fork of frequency \(380\;Hz\) is moving towards a wall with a velocity of \(4\;m/s\). Then the number of beats heard by a stationary listener between direct and reflected sounds will be:(velocity of sound in air is \(340\;m/s\) )
supporting img

1 \(5\)
2 \(0\)
3 \(10\)
4 \(7\)
PHXI15:WAVES

354697 A motor car blowing a horn of frequency \(124\,Hz\) moves with a velocity \(72\;km/hr\) towards a tall wall. The frequency of the refelected sound heard by the driver will be (velocity of sound in air is \(330\;m/s)\)

1 \(132\,Hz\)
2 \(109\,Hz\)
3 \(248\,Hz\)
4 \(140\,Hz\)