Home
Class 12
PHYSICS
A positronium atom consist of an electro...

A positronium atom consist of an electron and a positron revolving about their common centre of mass . Calculate
Kinetic energy of the electron in ground state

A

`4.5eV`

B

`6.8eV`

C

`7.6eV`

D

`8.0eV`

Text Solution

Verified by Experts

The correct Answer is:
B
`KE=1/2m (omegar/2)^(2)=1/2.(m.omega^(2)r^(2))/4=(Ke^(2))/(4r)`
` (Ke^(2))/(4xx(0.529Åxx2))=(13.6eV)/4=3.4eV`
Promotional Banner

Topper's Solved these Questions

  • ATOMIC PHYSICS

    NARAYNA|Exercise LEVEL-I (H.W)|22 Videos

  • ATOMIC PHYSICS

    NARAYNA|Exercise LEVEL-II (H.W)|14 Videos

  • ATOMIC PHYSICS

    NARAYNA|Exercise LEVEL-V|51 Videos

  • ALTERNATING CURRENT

    NARAYNA|Exercise LEVEL - II(H.W)|13 Videos

  • ATOMS

    NARAYNA|Exercise EXERCISE -4|47 Videos

Similar Questions

Explore conceptually related problems

A positronium atom consist of an electron and a positron revolving about their common centre of mass . Calculate Separation between the electron and positron in their first excited state.

A positronium consists of an electron and a positron revolving about their common centre of mass. Calculate the separation between the electron and positron in their first excited state:

Calculate the energy of the electron in the ground state of the hydrogen atom.

The positronium consisting of an electron and a positron corresponding binding energy and wavelength of first line in Lyman series of such a system.

If potential energy of an electron in a hydrogen atom in first excited state is taken to be zero kinetic energy (in eV ) of an electron in ground state will be

Total energy of an electron in the hydrogen atom in the ground state is -13.6 eV. The potential energy of this electron is

If R is the Rydberg's constant, the energy of an electron in the ground state H atom is

NARAYNA-ATOMIC PHYSICS-LEVEL-VI
  1. The properties of x -rays as put forwarded by Rontgen in his pioneerin...

    Text Solution

    |

  2. A positronium atom consist of an electron and a positron revolving abo...

    Text Solution

    |

  3. A positronium atom consist of an electron and a positron revolving abo...

    Text Solution

    |

  4. A neutrons beam, in which each neutron has same Kinetic energy , is pa...

    Text Solution

    |

  5. A neutrons beam, in which each neutron has same Kinetic energy , is pa...

    Text Solution

    |

  6. If an electrons jumps from m^(th) orbit to the nth orbit (mgtn) the en...

    Text Solution

    |

  7. If an electrons jumps from m^(th) orbit to the nth orbit (mgtn) the en...

    Text Solution

    |

  8. A beam of alpha paricles is incident on a target of lead. A particular...

    Text Solution

    |

  9. A beam of alpha paricles is incident on a target of lead. A particular...

    Text Solution

    |

  10. A beam of alpha paricles is incident on a target of lead. A particular...

    Text Solution

    |

  11. In each of the following questions, a statement is given and a corresp...

    Text Solution

    |

  12. Statement-2: When a beam of highly energetic neutrons is incident on a...

    Text Solution

    |

  13. Assertion: In the duration electron jumps from fist excited state to g...

    Text Solution

    |

  14. Statement -1: In process of photoelectric emission , all emitted elect...

    Text Solution

    |

  15. Statement-1: The de-Broglie wavelength of a molecules (in a sample of ...

    Text Solution

    |

  16. Statement -1: When applied potential difference Between cathode and an...

    Text Solution

    |

  17. Statement-1: In Photoelectric effect , electrons absorbing the photon ...

    Text Solution

    |

  18. In Fig. electromagnetic radiations of wavelength 200nm are incident on...

    Text Solution

    |

  19. Consider Bohr's theory for hydrogen atom. The magnitude of angular mom...

    Text Solution

    |

  20. An gas of H-atom in excited state n(2) absorbs a photon of some energy...

    Text Solution

    |