Home
Class 12
PHYSICS
In an excited state of hydrogen like ato...

In an excited state of hydrogen like atom an electron has total energy of `-3.4 eV`. If the kinetic energy of the electron is E and its de-Broglie wavelength is `lambda`, then

A

`E = 6.8 eV, lambda = 6.6 xx 10^(10)`

B

`E = 3.4 eV, lambda = 6.6 xx 10^(-10) m`

C

`E = 3.4 eV, lambda = 6.6 xx 10^(-11) m`

D

`E = 6.8 eV, lambda = 6.6 xx 10^(-11) m`

Text Solution

Verified by Experts

The correct Answer is:
B
`P.E. = -2(K.E.)`
`T.E. = (P.E.) + (K.E.)`
`T.E. = - 2(K.E.) + (K.E.)`
`T.E. = - (K.E.) - T.E. = K.E. , K.E. = 3.4 eV`
`lambda = 6.6 xx 10^(-10) m`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • SIMPLE HARMONIC MOTION

    ALLEN |Exercise Exercise - 19|2 Videos

  • SIMPLE HARMONIC MOTION

    ALLEN |Exercise Exercise - 20|2 Videos

  • SIMPLE HARMONIC MOTION

    ALLEN |Exercise Exercise - 17|2 Videos

  • RACE

    ALLEN |Exercise Basic Maths (Wave Motion & Dopplers Effect) (Stationary waves & doppler effect, beats)|25 Videos

  • TEST PAPER

    ALLEN |Exercise PHYSICS|4 Videos

Similar Questions

Explore conceptually related problems

An electron, in a hydrogen like atom , is in excited state. It has a total energy of -3.4 eV , find the de-Broglie wavelength of the electron.

The ground state energy of hydrogen atom is –13.6 eV. What are the kinetic and potential energies of the electron in this state?

Knowledge Check

  • The ground state energy of hydrogen atom is -13.6 eV. What are the kinetic and potential energies of the electron in this state ?

    A
    `K = - 13.6 eV, U = -27.2 eV`
    B
    `K = 13.6 eV, U = -27.2 eV`
    C
    `K = - 13.6 eV, U = 27.2 eV`
    D
    `K = 13.6 eV, U = 27.2 eV`

  • If kinetic energy of particle is made 16 times,percentage change in its de-Broglie wavelength will be…….

    A
    25
    B
    50
    C
    60
    D
    75

  • The ground state energy of hydrogen atom is - 13.6 eV. What is the potential energy of the electron in this state ?

    A
    0eV
    B
    `-27.2 eV`
    C
    `1 eV`
    D
    `2e V`

    • Similar Questions

    Explore conceptually related problems

    The total energy of an electron in the first excited state of the hydrogen atom is about -3.4 eV. What is the kinetic energy of the electron in this state ?

    The total energy of an electron in the first excited state of the hydrogen atom is about –3.4 eV. (a) What is the kinetic energy of the electron in this state? (b) What is the potential energy of the electron in this state? (c) Which of the answers above would change if the choice of the zero of potential energy is changed?

    The ground state energy of hydrogen atom is- 13.6 eV. What are the kinetic and potential energies of the electron in this state ?

    In any Bohr orbit of the hydrogen atom, the ratio of kinetic energy to potential energy of the electron is ......

    What is the de-Broglie wavelength of a electron with kinetic energy of 120 eV?

    Home
    Profile