Home
Class 11
CHEMISTRY
A stream of electrons from a heated fila...

A stream of electrons from a heated filament was passed between two charged plates kept at a potential different V esu. If e and m are charge and mass of an electron, respectively, then the value of `h//lamda`(where `lamda` is wavelength associated with electron wave) is given by-

A

`meV`

B

`2meV`

C

`sqrt(meV)`

D

`sqrt(2meV)`

Text Solution

Verified by Experts

The correct Answer is:
D
`lamda=(h)/(p)=(h)/(sqrt(2mE))=(h)/(sqrt(meV))" "therefore (h)/(lamda)=sqrt(2meV)`
Promotional Banner

Topper's Solved these Questions

  • STRUCTURE OF ATOM

    CHHAYA PUBLICATION|Exercise MCQ HOTSPOT (SINGLE CORRECT TYPE)|68 Videos

  • STRUCTURE OF ATOM

    CHHAYA PUBLICATION|Exercise EXERCISE (VERY SHORT TYPE QUESTION)|33 Videos

  • STRUCTURE OF ATOM

    CHHAYA PUBLICATION|Exercise HIGHER ORDER THINKING SKILL (HOTS) QUESTIONS|19 Videos

  • STATES OF MATTER : GASES AND LIQUIDS

    CHHAYA PUBLICATION|Exercise PRACTICE SET|10 Videos

Similar Questions

Explore conceptually related problems

The wavelength associated with an electron of mass m having kinetic energy E is given by

The wavelength of matter waves associated with an electron of mass m having kinetic energy E is given by

An electron of mass m and charge e is accelerated from rest through a potential difference V in vacuum. Its final speed will be

An electron of charge e and mass m is acceleration from rest with a potential V. What is the de Broglie wavelength of the electron?

An electron (charge = e, mass = m) is accelerated from rest through a potential difference of V volt. What will be the de Broglie wavelength of the electron?

An electron is subjected to a potential difference of 180 V. Mass and charge of an electron are 9 xx 10^(-31)kg and 1.6 xx 10^(-19)C , respectively. Find the velocity acquired by the electron.

A parallel plate capacitor of plate area A and plate separation d is charged to a potential difference V and then the battery is disconnected. A slab of dielectric constant k is then inserted between the plates of the capacitor so as to fill the space between the plates. If Q, E and W denote respectively the charge on each plate, the electric field between the plates and the work done in the process of inserting the slab, then

CHHAYA PUBLICATION-STRUCTURE OF ATOM-ENTRANCE QUESTION BANK
  1. The correct set of four quantum numbers of the valence electrons of ru...

    Text Solution

    |

  2. Which of the following is the energy of a possible excited state of hy...

    Text Solution

    |

  3. A stream of electrons from a heated filament was passed between two ch...

    Text Solution

    |

  4. The radius of the second Bohr orbit for hydrogen atom is [Planck's con...

    Text Solution

    |

  5. If n=6, correct sequence for filling of electrons will be-

    Text Solution

    |

  6. The energies E(1) and E(2) of two radiations are 25eV and 50eV respect...

    Text Solution

    |

  7. Total number of orbitals in 4th energy level of an atom is-

    Text Solution

    |

  8. According to Bohr's theory, which of the following transition is H-ato...

    Text Solution

    |

  9. The correct set of four quantum numbers for the valence electron of ru...

    Text Solution

    |

  10. What is the maximum number of electrons that can be associated with th...

    Text Solution

    |

  11. The value of Planck's constant is 6.63xx10^(-34)J*s. The speed of ligh...

    Text Solution

    |

  12. Based on equation E=-2.178xx10^(-18)((z^(2))/(n^(2)))J, certain conclu...

    Text Solution

    |

  13. What is the maximum number of electrons that can be associated with th...

    Text Solution

    |

  14. Calculate the energy in joule corresponding to light of wavelength 45 ...

    Text Solution

    |

  15. What is the maximum number of orbitals that can be identified with the...

    Text Solution

    |

  16. Which is the correct order of increasing energy of the listed orbitals...

    Text Solution

    |

  17. Gadolinium belongs to 4f-series. Its atomic number is 64. which of the...

    Text Solution

    |

  18. Which of the following pairs of d-orbitals witll have electron density...

    Text Solution

    |

  19. How many electrons can fit in the orbital for which n=3 and l=1-

    Text Solution

    |

  20. Two electrons occupying the sme orbital are distinguished by-

    Text Solution

    |