Home
Class 12
PHYSICS
The energy released by the fission of on...

The energy released by the fission of one uranium atom is 200 MeV. The number of fissions per second required to produce 3.2 W of power is (Take leV `= 1.6xx10^(-19)J)`

A

`10^7`

B

`10^(10)`

C

`10^(15)`

D

`10^(11)`

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • QUESTION PAPER 2009

    WB JEE PREVIOUS YEAR PAPER|Exercise Multiple Choice Questions (Physics)|40 Videos

  • QUESTION PAPER 2011

    WB JEE PREVIOUS YEAR PAPER|Exercise PHYSICS|39 Videos

Similar Questions

Explore conceptually related problems

The energy liberated per nuclear fission is 200 MeV. If 10^20 fissions occur per second the amount of power produced will be

How many photons of wavelength , 50 Å are required to produce 0.2 J of energy ? ( h = 6.626 xx 10^(-34) J *s )

The number of photons emitted per second by a 60 W source of monochromatic light of wavelength 663 nm is (h= 6.63xx10^(-34) Js)

Find the number of photons emitted per second by a source of power 25W. Assume, wavelength of emitted light = 6000Å. h = 6.62 xx 10^(-34)J.s

A copper wire of diameter 2/(3sqrtpi)mm is carrying a current of 1 amp. Calculate the number of free electrons which flow past any cross section of the wire per sec Also find the average speed with which free electrons are flowing in the copper wire assuming that there is one free electron per atom of copper. Number of atmos per cm^3 of copper =9 times 10^22 , electronic charge =1.6 times 10^-19 coulomb.

Work function of a metal is 2.3eV and on 1.0 cm^(2) area of that metal, a light of intensity 8.6 xx 10^(3) W.m^(-2) is incident. That intensity is distributed equally among the wavelength 4144 Å, 4972 Å and 6216 Å . If no ray is lost due to scattering and if each of the photons of proper energy can emit photoelectrons, what will be the number of photoelectrons emitted in 2 s? (h = 6.63 xx 10^(-34) J.s, 1eV = 1.6 xx 10^(-19)J)

The emitter of an n-p-n transistor emits 1.25 xx 10^(10) electrons per micro-second ( mu s). Find the emitter current in mA. (Given : electronic charge, e= 1.6xx10^(-19) coulomb).

Calculate the velocity of electron ejected from platinum surface when radiation of 200 nm falls on it. Work function of platinum is 5eV. (1eV=1.6xx10^-19J)

A stream of photons of energy 10.6 eV and intensity 2.0 W m^(-2) is incident on a platinum surface. Area of the surface is 1.0 xx 10^(-4) m^(2) and its work function is 5.6 eV. 0.53 % of incident photons emit photoelectrons. Find the number of photoelectrons emitted per second and maximum and minimum energies of the emitted photoelectrons in eV. (1eV = 1.6 xx 10^(-19)J)

The energy of electron of H atom is, E_n = -(2.18xx10^-18)/n^2 J. How amount of energy is required to remove the electron from n = 2 orbit? What is the value of longest wave length of light required to remove this electron?

WB JEE PREVIOUS YEAR PAPER-QUESTION PAPER 2010-PHYSICS
  1. In a common emitter configuration, a transistor has beta=50 and input...

    Text Solution

    |

  2. Half-life of a radioactive substance is 20 minute. The time between 20...

    Text Solution

    |

  3. The energy released by the fission of one uranium atom is 200 MeV. The...

    Text Solution

    |

  4. A body is projected with a speed u m/s at an angle beta with the hori...

    Text Solution

    |

  5. A ball is projected horizontally with a velocity of 5 m/s from the top...

    Text Solution

    |

  6. A stone falls freely from rest and the total distance covered by it in...

    Text Solution

    |

  7. Two blocks of 2 kg and 1kg are in contact on a frictionless table. If ...

    Text Solution

    |

  8. If momentum is increased by 20%, then kinetic energy increases by

    Text Solution

    |

  9. A boy of mass 40 kg is climbing a vertical pole at a constant speed. I...

    Text Solution

    |

  10. The value of lamda for which the two vectors hata = 5hati+lamdahatj+...

    Text Solution

    |

  11. If veca+vecb = vecc and a+b=c then the angle included between veca an...

    Text Solution

    |

  12. The height vertically above the earth's surface at which the accelerat...

    Text Solution

    |

  13. The change in the gravitational potential energy when a body of mass m...

    Text Solution

    |

  14. A particle of mass m is attached to three identical massless springs o...

    Text Solution

    |

  15. A spring of force constant k is cut into three equal parts. The force ...

    Text Solution

    |

  16. A body floats in water with 40% of its volume outside water. When the ...

    Text Solution

    |

  17. A uniform long tube is bent into a circle of radius R and it lies in a...

    Text Solution

    |

  18. Two solid spheres of same metal but of mass M and 8 M fall simultaneou...

    Text Solution

    |

  19. A particle is executing linear simple harmonic motion of amplitude A. ...

    Text Solution

    |

  20. The equation of a progressive wave is y=4sin(4pi t-0.04x +pi//3) wher...

    Text Solution

    |