Home
Class 12
PHYSICS
At t = 0 source starts falling under gra...

At t = 0 source starts falling under gravity and a detector is projected upwards with a velocity 10m/s. For the vertical upward motion of detector

A

apparent frequency received by detector = source frequency.

B

initially apparent frequency `gt` source frequency and finally less than source frequency.

C

apparent frequency depends only on the detector velocity.

D

date insufficient.

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • ELASTICITY AND WAVES

    FIITJEE|Exercise Assignment Problems (Objective) Level-II|15 Videos

  • ELASTICITY AND WAVES

    FIITJEE|Exercise Assignment Problems (Subjective) Level-II & III|15 Videos

  • CURRENT ELECTRICITY

    FIITJEE|Exercise Comprehension -4|3 Videos

  • ELECTROMAGNETIC INDUCTION

    FIITJEE|Exercise EXERCISE|9 Videos

Similar Questions

Explore conceptually related problems

A whistle of frequency f_(0)=1300Hz is dropped from a height H=505 m above the ground. At the same time,a detector is projected upwards with velocity u=50ms^(-1) along the same line.If the velocity of sound is V=300ms^(-1) The frequency detected by the detector after t=5s is

A source of sound and a detector are placed at the same place on ground At t=0 , the source S is projected towards reflector with velocity v_0 in vertical upward directon and reflector starts moving down with constant velocity v_0 At t-0 , the vertical separation between the reflector and source is H((gtv_0^2)/(2g)) . The speed of sound in air is v(gtgtv_0) , Take f_0 as the frequency of sound waves emitted by source. Based on above information answer the following questions. Q. Wavelength of sound waves as received by detector before reflection at t=(v_0)/(2g) is

A source of sound and a detector are placed at the same place on ground At t=0 , the source S is projected towards reflector with velocity v_0 in vertical upward directon and reflector starts moving down with constant velocity v_0 At t-0 , the vertical separation between the reflector and source is H((gtv_0^2)/(2g)) . The speed of sound in air is v(gtgtv_0) , Take f_0 as the frequency of sound waves emitted by source. Based on above information answer the following questions. Q. Frequency of sound received by detector after being reflected by reflector at t=(v_0)/(2g) is

A source of sound and a detector are placed at the same place on ground At t=0 , the source S is projected towards reflector with velocity v_0 in vertical upward directon and reflector starts moving down with constant velocity v_0 At t-0 , the vertical separation between the reflector and source is H((gtv_0^2)/(2g)) . The speed of sound in air is v(gtgtv_0) , Take f_0 as the frequency of sound waves emitted by source. Based on above information answer the following questions. Q. Frequency of sound waves emitted by source at t=(v_0)/(2g) is

A particle is projected vertically upward with velocity u from a point A , when it returns to the point of projection .

A ball of mass 100 gm is projected upwards with velocity (10 m//s) . It returns back with (6 m//s) . Find work done by air resistance .

A particle is projected vertically upwards from ground with velocity 10 m // s. Find the time taken by it to reach at the highest point ?

At time t=0 a body is thrown vertically upwards with a velocity "50m/sec" .At time t=2 sec another body is thrown vertically upwards with the same velocity "50m/sec" .the two bodies will meet at time__ sec (a=10m/sec^(2))

FIITJEE-ELASTICITY AND WAVES -Assignment Problems (Objective) Level-I
  1. A string is hanging from a rigid support. A transverse wave pulse is s...

    Text Solution

    |

  2. Standing waves can be produced in

    Text Solution

    |

  3. At t = 0 source starts falling under gravity and a detector is project...

    Text Solution

    |

  4. Two particles in a medium are vibrating with a path difference of 10 m...

    Text Solution

    |

  5. y(1)=Asin(omegat-kx)&y(2)=Asin(omegat-kx+delta): these two equations a...

    Text Solution

    |

  6. A wave is represented by the equation y=[Asin{10pix+15pit+(pi//4)}] wh...

    Text Solution

    |

  7. The ends of a stretched wire of length L are fixed at x = 0 and x = L....

    Text Solution

    |

  8. A cylinderical tube open at both ends, has a fundamental frequency f i...

    Text Solution

    |

  9. Two wires of same material and same extension Deltal have lengths l an...

    Text Solution

    |

  10. A steel ring of radius r and cross section area A is fitted on to a wo...

    Text Solution

    |

  11. The Young's modulus of a wire of length L and radius r is Y newton/m^(...

    Text Solution

    |

  12. A spherical ball contracts in volume by 0.01% when subjected to a norm...

    Text Solution

    |

  13. If a gas is heated at constant pressure, its isothermal compressibilit...

    Text Solution

    |

  14. A beam of metal supported at the two edges is loaded at the centre. Th...

    Text Solution

    |

  15. When metal wire is stretched by a load the fectional change in its vol...

    Text Solution

    |

  16. The length of a metal wire is l(1) when the tension in it is T(1) and ...

    Text Solution

    |

  17. A uniform pressure P is exerted on all sides of a solid cube at temper...

    Text Solution

    |

  18. A steel wire is suspended vertically from a rigid support. When loaded...

    Text Solution

    |

  19. A metal rod of length l, cross-sectional area A, Young's modulus Y and...

    Text Solution

    |

  20. The Young's modulus of brass and steel are respectively 1.0xx10^(11)N/...

    Text Solution

    |