Doppler Effect
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NEET DIGITAL LIBRARY
PHXI15:WAVES

354715 A source of sound and an observer are approaching each other with the same speed, which is equal to \(\dfrac{1}{10}\) times the speed of sound. The apparent relative change in the frequency of the source is

1 \(22.2 \%\) increase
2 \(18.2 \%\) increase
3 \(22.2 \%\) decrease
4 \(18.2 \%\) decrease
PHXI15:WAVES

354716 A source of sound emits sound waves at frequency \(f_{0}\). It is moving towards an observer with fixed speed \(v_{s}\left(v_{s} < v\right.\), where \(v\) is the speed of sound in air). If the observer were to move towards the source with speed \(v_{0}\), one of the following two graphs (\(A\) and \(B\)) will given the correct variation of the frequency \(f\) heard by the observer as \(v_{0}\) is changed.
supporting img

1 Graph \(A\) with slope \( = \frac{{{f_0}}}{{\left( {v + {v_s}} \right)}}\)
2 Graph \(B\) with slope \(=\dfrac{f_{0}}{\left(v-v_{s}\right)}\)
3 Graph \(A\) with slope \(=\dfrac{f_{0}}{\left(v-v_{s}\right)}\)
4 Graph \(B\) with slope \(=\dfrac{f_{0}}{\left(v+v_{s}\right)}\)
JEE - 2015
PHXI15:WAVES

354717 In Doppler effect, when a source moves towards a stationary observer, the apparent increase in frequency is due to

1 Increase in wavelength of sound received by observer
2 Decrease in wavelength of sound received by observer
3 Increase in velocity of waves received by observer
4 Decrease in number of waves received by observer in one second
PHXI15:WAVES

354718 A source of sound is moving with constant velocity of \(20\;m/s\) emitting a note of frequency \(1000\;Hz\). The ratio of frequencies observed by a stationary observer while the source is approaching him and after it crosses him will be

1 \(8: 9\)
2 \(9: 8\)
3 \(9: 10\)
4 \(1: 1\)
Join With Us for More Updates
PHXI15:WAVES

354715 A source of sound and an observer are approaching each other with the same speed, which is equal to \(\dfrac{1}{10}\) times the speed of sound. The apparent relative change in the frequency of the source is

1 \(22.2 \%\) increase
2 \(18.2 \%\) increase
3 \(22.2 \%\) decrease
4 \(18.2 \%\) decrease
PHXI15:WAVES

354716 A source of sound emits sound waves at frequency \(f_{0}\). It is moving towards an observer with fixed speed \(v_{s}\left(v_{s} < v\right.\), where \(v\) is the speed of sound in air). If the observer were to move towards the source with speed \(v_{0}\), one of the following two graphs (\(A\) and \(B\)) will given the correct variation of the frequency \(f\) heard by the observer as \(v_{0}\) is changed.
supporting img

1 Graph \(A\) with slope \( = \frac{{{f_0}}}{{\left( {v + {v_s}} \right)}}\)
2 Graph \(B\) with slope \(=\dfrac{f_{0}}{\left(v-v_{s}\right)}\)
3 Graph \(A\) with slope \(=\dfrac{f_{0}}{\left(v-v_{s}\right)}\)
4 Graph \(B\) with slope \(=\dfrac{f_{0}}{\left(v+v_{s}\right)}\)
JEE - 2015
PHXI15:WAVES

354717 In Doppler effect, when a source moves towards a stationary observer, the apparent increase in frequency is due to

1 Increase in wavelength of sound received by observer
2 Decrease in wavelength of sound received by observer
3 Increase in velocity of waves received by observer
4 Decrease in number of waves received by observer in one second
PHXI15:WAVES

354718 A source of sound is moving with constant velocity of \(20\;m/s\) emitting a note of frequency \(1000\;Hz\). The ratio of frequencies observed by a stationary observer while the source is approaching him and after it crosses him will be

1 \(8: 9\)
2 \(9: 8\)
3 \(9: 10\)
4 \(1: 1\)
For More Updates join with Us
PHXI15:WAVES

354715 A source of sound and an observer are approaching each other with the same speed, which is equal to \(\dfrac{1}{10}\) times the speed of sound. The apparent relative change in the frequency of the source is

1 \(22.2 \%\) increase
2 \(18.2 \%\) increase
3 \(22.2 \%\) decrease
4 \(18.2 \%\) decrease
PHXI15:WAVES

354716 A source of sound emits sound waves at frequency \(f_{0}\). It is moving towards an observer with fixed speed \(v_{s}\left(v_{s} < v\right.\), where \(v\) is the speed of sound in air). If the observer were to move towards the source with speed \(v_{0}\), one of the following two graphs (\(A\) and \(B\)) will given the correct variation of the frequency \(f\) heard by the observer as \(v_{0}\) is changed.
supporting img

1 Graph \(A\) with slope \( = \frac{{{f_0}}}{{\left( {v + {v_s}} \right)}}\)
2 Graph \(B\) with slope \(=\dfrac{f_{0}}{\left(v-v_{s}\right)}\)
3 Graph \(A\) with slope \(=\dfrac{f_{0}}{\left(v-v_{s}\right)}\)
4 Graph \(B\) with slope \(=\dfrac{f_{0}}{\left(v+v_{s}\right)}\)
JEE - 2015
PHXI15:WAVES

354717 In Doppler effect, when a source moves towards a stationary observer, the apparent increase in frequency is due to

1 Increase in wavelength of sound received by observer
2 Decrease in wavelength of sound received by observer
3 Increase in velocity of waves received by observer
4 Decrease in number of waves received by observer in one second
PHXI15:WAVES

354718 A source of sound is moving with constant velocity of \(20\;m/s\) emitting a note of frequency \(1000\;Hz\). The ratio of frequencies observed by a stationary observer while the source is approaching him and after it crosses him will be

1 \(8: 9\)
2 \(9: 8\)
3 \(9: 10\)
4 \(1: 1\)
NEET DIGITAL LIBRARY
PHXI15:WAVES

354715 A source of sound and an observer are approaching each other with the same speed, which is equal to \(\dfrac{1}{10}\) times the speed of sound. The apparent relative change in the frequency of the source is

1 \(22.2 \%\) increase
2 \(18.2 \%\) increase
3 \(22.2 \%\) decrease
4 \(18.2 \%\) decrease
PHXI15:WAVES

354716 A source of sound emits sound waves at frequency \(f_{0}\). It is moving towards an observer with fixed speed \(v_{s}\left(v_{s} < v\right.\), where \(v\) is the speed of sound in air). If the observer were to move towards the source with speed \(v_{0}\), one of the following two graphs (\(A\) and \(B\)) will given the correct variation of the frequency \(f\) heard by the observer as \(v_{0}\) is changed.
supporting img

1 Graph \(A\) with slope \( = \frac{{{f_0}}}{{\left( {v + {v_s}} \right)}}\)
2 Graph \(B\) with slope \(=\dfrac{f_{0}}{\left(v-v_{s}\right)}\)
3 Graph \(A\) with slope \(=\dfrac{f_{0}}{\left(v-v_{s}\right)}\)
4 Graph \(B\) with slope \(=\dfrac{f_{0}}{\left(v+v_{s}\right)}\)
JEE - 2015
PHXI15:WAVES

354717 In Doppler effect, when a source moves towards a stationary observer, the apparent increase in frequency is due to

1 Increase in wavelength of sound received by observer
2 Decrease in wavelength of sound received by observer
3 Increase in velocity of waves received by observer
4 Decrease in number of waves received by observer in one second
PHXI15:WAVES

354718 A source of sound is moving with constant velocity of \(20\;m/s\) emitting a note of frequency \(1000\;Hz\). The ratio of frequencies observed by a stationary observer while the source is approaching him and after it crosses him will be

1 \(8: 9\)
2 \(9: 8\)
3 \(9: 10\)
4 \(1: 1\)
Join With Us for More Updates