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1. \(4\)

2. \(8\)

3. \(2\)

4. zero

Subtopic: Doppler's Effect (OLD NCERT) |

From NCERT

NEET - 2013

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The length of a wire between the two ends of a sonometer is \(100\) cm. What should be the positions of two bridges below the wire so that the three segments of the wire have their fundamental frequencies in the ratio \(1:3:5\)?

1. \(\frac{1500}{23} \mathrm{~cm}, \frac{500}{23} \mathrm{~cm} \)

2. \(\frac{1500}{23} \mathrm{~cm}, \frac{300}{23} \mathrm{~cm} \)

3. \(\frac{300}{23} \mathrm{~cm}, \frac{1500}{23} \mathrm{~cm} \)

4. \(\frac{1500}{23} \mathrm{~cm}, \frac{2000}{23} \mathrm{~cm}\)

1. \(\frac{1500}{23} \mathrm{~cm}, \frac{500}{23} \mathrm{~cm} \)

2. \(\frac{1500}{23} \mathrm{~cm}, \frac{300}{23} \mathrm{~cm} \)

3. \(\frac{300}{23} \mathrm{~cm}, \frac{1500}{23} \mathrm{~cm} \)

4. \(\frac{1500}{23} \mathrm{~cm}, \frac{2000}{23} \mathrm{~cm}\)

Subtopic: Standing Waves |

From NCERT

NEET - 2013

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Two identical piano wires, kept under the same tension T, have a fundamental frequency of 600 Hz. The fractional increase in the tension of one of the wires which will lead to the occurrence of 6 beats/s when both the wires oscillate together would be:

1. 0.01

2. 0.02

3. 0.03

4. 0.04

Subtopic: Beats |

62%

From NCERT

AIPMT - 2011

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The equation of a simple harmonic wave is given by \(y=3\sin \frac{\pi}{2}(50t-x)\) where \(x \) and \(y\) are in meters and \(t\) is in seconds. The ratio of maximum particle velocity to the wave velocity is:

1. \(\frac{3\pi}{2}\)

2. \(3\pi\)

3. \(\frac{2\pi}{3}\)

4. \(2\pi\)

Subtopic: Wave Motion |

74%

From NCERT

AIPMT - 2012

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Which one of the following statements is true?

1. | Both light and sound waves in the air are transverse. |

2. | The sound waves in the air are longitudinal while the light waves are transverse. |

3. | Both light and sound waves in the air are longitudinal. |

4. | Both light and sound waves can travel in a vacuum. |

Subtopic: Types of Waves |

81%

From NCERT

AIPMT - 2006

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The time of reverberation of a room *\(A\)* is one second. What will be the time (in seconds) of reverberation of a room, having all the dimensions double those of room *A*?

1. 2

2. 4

3. $\frac{1}{2}$

4. 1

Subtopic: Speed of Sound |

AIPMT - 2006

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A transverse wave propagating along the x-axis is represented by:

\(y=(x,t)=8.0\mathrm{sin}(0.5\pi x-4\pi t-\frac{\pi}{4})\) where \(x\) is in meters and \(t\) in seconds. The speed of the wave is:

1. \(4\pi\) m/s

2. \(0.5\) m/s

3. \(\frac{\pi}{4}\) m/s

4. \(8\) m/s

Subtopic: Wave Motion |

82%

From NCERT

AIPMT - 2006

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Two sound waves with wavelengths 5.0 m and 5.5 m, respectively, propagate in gas with a velocity of 330 m/s. How many beats per second can we expect?

1. 12

2. 0

3. 1

4. 6

Subtopic: Beats |

75%

From NCERT

AIPMT - 2006

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The wave described by \(y=0.25\sin (10\pi x-2\pi t)\), where \(x \) and \(y\) are in metre and \(t\) in second, is a wave travelling along the:

1. | \(1\) Hz | –ve x-direction with frequency

2. | \(\pi\) Hz and wavelength \(\lambda=0.2\) m | +ve x-direction with frequency

3. | \(1\) Hz and wavelength \(\lambda=0.2\) m | +ve x-direction with frequency

4. | \(0.25\) m and wavelength \(\lambda=0.2\) m | –ve x-direction with amplitude

Subtopic: Wave Motion |

84%

From NCERT

AIPMT - 2008

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Each of the two strings of lengths 51.6 cm and 49.1 cm is tensioned separately by 20 N of force. The mass per unit length of both strings is the same and equals 1 g/m. When both the strings vibrate simultaneously, the number of beats is:

1. | 5 | 2. | 7 |

3. | 8 | 4. | 3 |

Subtopic: Beats |

56%

From NCERT

AIPMT - 2009

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