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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: Â Types of Waves |

Â 81%

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AIPMT - 2006

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Which of the following is a mechanical wave?

1. | Radio waves | 2. | X-rays |

3. | Light waves | 4. | Sound waves |

Subtopic: Â Types of Waves |

Â 87%

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Velocity of sound in air is \(332\) m/s. Its velocity in the vacuum will be:

1. \(>332\) m/s

2. \(=332\) m/s

3. \(<332\) m/s

4. meaningless

Subtopic: Â Types of Waves |

Â 63%

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A wave moving in a gas:

1. | must be longitudinal | 2. | may be longitudinal |

3. | must be transverse | 4. | may be transverse |

Subtopic: Â Types of Waves |

Â 54%

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A waveform given by: \(y=3A\sin(\omega t-kx)\)

is superposed with another waveform \(y=4A\cos(\omega t-kx).\) The amplitude of the resulting waveform will be:

is superposed with another waveform \(y=4A\cos(\omega t-kx).\) The amplitude of the resulting waveform will be:

1. | \(7A\) | 2. | \(A\) |

3. | \(3.5A\) | 4. | \(5A\) |

Subtopic: Â Wave Motion |

Â 85%

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A sinusoidal waveform is travelling along the \(x \)-axis. The phase difference between two particles separated by \(10\) cm is \(\frac\pi{2}{}.\) The wavelength of the wave is:

1. \(20\) cm

2. \(30\) cm

3. \(40\) cm

4. \(80\) cm

1. \(20\) cm

2. \(30\) cm

3. \(40\) cm

4. \(80\) cm

Subtopic: Â Wave Motion |

Â 88%

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Sinusoidal sound waves of the same frequency travelling in air along the \(x\)-axis and the \(y\)-axis arrive in phase with each other at the origin. Their amplitudes are equal to \(A\) (each). The amplitude of the vibration at the origin is:

1. \(A\)

2. \(\sqrt 2A\)

3. \(2A\)

4. \((2+\sqrt2)A\)

1. \(A\)

2. \(\sqrt 2A\)

3. \(2A\)

4. \((2+\sqrt2)A\)

Subtopic: Â Wave Motion |

From NCERT

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Two waves are represented by the equations \(y_1 = a\sin(\omega t+kx+0.57)~\text{m}\) and \(y_2 = a\cos(\omega t+kx)~\text{m},\) where \(x\) is in meters and \(t\) in seconds. The phase difference between them is:

1. \(1.25\) rad

2. \(1.57\) rad

3. \(0.57\) rad

4. \(1.0\) rad

1. \(1.25\) rad

2. \(1.57\) rad

3. \(0.57\) rad

4. \(1.0\) rad

Subtopic: Â Wave Motion |

Â 67%

From NCERT

AIPMT - 2011

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If the initial tension on a stretched string is doubled, then the ratio of the initial and final speeds of a transverse wave along the string is:

1. \(1:2\)

2. \(1:1\)

3. \(\sqrt{2}:1\)

4. \(1:\sqrt{2}\)

1. \(1:2\)

2. \(1:1\)

3. \(\sqrt{2}:1\)

4. \(1:\sqrt{2}\)

Subtopic: Â Travelling Wave on String |

Â 69%

From NCERT

NEET - 2022

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A rope of uniform mass per unit length \(\mu\) is suspended from the ceiling, hanging under its own weight. If a small transverse pulse is formed at its lower end A, it travels upward with a local speed \(v=\sqrt {\dfrac{\text{tension}}{\text{mass/length}}}\).

The speed of the pulse is:

1. | maximum at A, minimum at O |

2. | minimum at A, maximum at O |

3. | uniform |

4. | minimum at A and O, maximum in the middle |

Subtopic: Â Travelling Wave on String |

Â 71%

From NCERT

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