Home
Class 11
PHYSICS
A string of length 0.4 m and mass 10 ^(-...

A string of length 0.4 m and mass `10 ^(-2)` kg is tightly clamped at its ends. The tension in the string is 1. 6 N. identical wave pulses are produced at one end at equal intervals of time `Delta t`. The value of `Delta t` which allows construction tnterference betwenn successive pulses is

A

`0.1 s`

B

`0.05 s`

C

`0.2 s`

D

constructive interference cannot take place

Text Solution

Verified by Experts

The correct Answer is:
C
Velocity of wave on string ` = sqrt(T//mu) = 8 m//s`.
The pulse gets inverted after reflection from the fixed end , so for constructive interference to take place between successive pulses , the first pulse has to undergo two reflections from the fixed end .
So , `Delta t = ( 2xx 0.4 + 2 xx 0.4)/(8) = 0.2 s`
Promotional Banner

Topper's Solved these Questions

  • SUPERPOSITION AND STANDING WAVES

    CENGAGE PHYSICS ENGLISH|Exercise Multiple|26 Videos

  • SUPERPOSITION AND STANDING WAVES

    CENGAGE PHYSICS ENGLISH|Exercise Assertion - Reasoning|6 Videos

  • SUPERPOSITION AND STANDING WAVES

    CENGAGE PHYSICS ENGLISH|Exercise Subjective|24 Videos

  • SOUND WAVES AND DOPPLER EFFECT

    CENGAGE PHYSICS ENGLISH|Exercise Integer|16 Videos

  • THERMODYNAMICS

    CENGAGE PHYSICS ENGLISH|Exercise 24|1 Videos

Similar Questions

Explore conceptually related problems

A string of length 0.4 m and mass 10 ^(-2) kg is tightly clamped at its ends. The tension in the string is 1. 6 N. identical wave pulses are produced at one end at equal intervals of time Delta t . The value of Delta t which allows construction interference between successive pulses is

A string of length 0.4 m and mass 10^(-2)kg is tightly clamped at its ends. The tension in the string is 1.6 N . Identical wave pulse are produced at one end at equal intervals of time, Deltat . The minimum value of Deltat which allows constructive interference of successive pulse is

A string of length L and mass M is lying on a horizontal table. A force F is applied at one of its ends. Tension in the string at a distance x from the end at which force is applied is

A string of length 1 m and mass 5 g is fixed at both ends. The tension in the string is 8.0 N. The string is set into vibration using an external vibrator of frequency 100 Hz. The separation between successive nodes on the string is close to :

A string of mass per unit length mu = 6 × 10^(-3) kg/m is fixed at both ends under the tension 540 N. If the string is in resonance with consecutive frequencies 420 Hz and 490 Hz. Then find the length of the string?

A string of length 20 cm and linear mass density 0.40 g//cm is fixed at both ends and is kept under a tension of 16 N.A wave pulse is produced at t=0 nearj an end as shown in figure which travels towards the other end. when will the string have the shape shown in the figure again? (inxx10^(-2)s)

A 1 kg stone at the end of 1 m long string is whirled in a vertical circle at constant speed of 4 m/sec. The tension in the string is 6 N when the stone is at (g =10m//sec^(2))

A uniform rod of length 1 m and mass 2 kg is suspended. Calculate tension T (in N ) in the string at the instant when the right string snaps (g = 10 m//s^(2)) .

A string of length 20 cm and linear mass density 0.40 g//cm is fixed at both ends and is kept under a tension of 16 N . A wave pulse is produced at t = 0 near an ends as shown in Fig. 7.17 (b) , which travels towards the other end . When will the string have the shape shown in the Fig . ( c).

A string of length 40 cm and weighing 10 g is attached to a spring at one end and to a fixed wall at the other end. The spring has a spring constant of 160 N m^-1 and is stretched by 1.0 cm. If a wave pulse is produced on the string near the wall, how much time will it take to reach the spring ?

CENGAGE PHYSICS ENGLISH-SUPERPOSITION AND STANDING WAVES-Single Correct
  1. A string fixed at both ends whose fundamental frequency is 240 Hz is ...

    Text Solution

    |

  2. If a string fixed at both ends having fundamental frequency of 240 Hz ...

    Text Solution

    |

  3. A string of length 0.4 m and mass 10 ^(-2) kg is tightly clamped at it...

    Text Solution

    |

  4. A train of sound wsves is propagated along a wide pipe and it is refle...

    Text Solution

    |

  5. An ideal organ pipe resonates at successive frequencies of 50 Hz , 150...

    Text Solution

    |

  6. A source of sound attached to the bob of a simple pendulum execute SHM...

    Text Solution

    |

  7. A standing wave arises on a string when two waves of equal amplitude ,...

    Text Solution

    |

  8. Two tunig forks of frequency 250Hz and 256Hz produce beats. If a maxim...

    Text Solution

    |

  9. Two separated sources emit sinusoidal travelling waves but have the sa...

    Text Solution

    |

  10. Standing waves can be produced.

    Text Solution

    |

  11. Regarding an open organ pipe , which of the following is correct?

    Text Solution

    |

  12. Two canoes are 10 m apart on a lake. Each bobs up and down with a per...

    Text Solution

    |

  13. A resonance occurs with a tuning fork and an air column of size 12 cm....

    Text Solution

    |

  14. In a resonance tube experiment, the first two resonance are observed a...

    Text Solution

    |

  15. A sound consists of four frequencies : 300 Hz , 600 Hz,1200 Hz and 240...

    Text Solution

    |

  16. A sound increases its decibel reading from 20 "to" 40 dB. This means t...

    Text Solution

    |

  17. To decrease the fundamental frequency of a stretched string fixed at b...

    Text Solution

    |

  18. If the sound waves produced by the tuning fork can be expressed as y =...

    Text Solution

    |

  19. A glass tube of length 1.5 m is filled completely with water , the wat...

    Text Solution

    |

  20. A wave equation is represented as r = A sin [ alpha (( x - y)/(2)) ...

    Text Solution

    |