Home
Class 11
PHYSICS
One amu is equivalent of 931meV energy. ...

One amu is equivalent of 931meV energy. The rest mass of electron is `9.1xx10^(-31)kg`. The mass equivalent energy is (Here `1amu=1.67xx10^(-27)kg`)

A

`2.5073MeV`

B

`0.693 MeV`

C

`4.0093MeV`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
A
(a) The mass off electron `=(9.1xx10^(-31))/(1.67xx10^(-27))` (amu)
`:.E=(9.1xx10^(-31))/(1.67xx10^(-27))xx931` MeV `=2.5073MeV`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • TRANSMISSION

    BITSAT GUIDE|Exercise All Questions|38 Videos

  • WAVE MOTION

    BITSAT GUIDE|Exercise BITSAT Archives|8 Videos

Similar Questions

Explore conceptually related problems

The mass of an electron is 9.11xx10^(-31)kg . How many elecrons would make 1kg?

Calculate the equivalent energy of electrons and proton at rest. Given that mass of electron =9.1xx10^(-31)kg and mass of proton =1.673xx10^(-27)kg .

Knowledge Check

  • The mass equivalent of 931 MeV energy is.

    A
    `1.66 xx 10^-27 kg`
    B
    `6.02 xx 10^-24 kg`
    C
    `1.66 xx 10^-20 kg`
    D
    `6.02 xx 10^-27 kg`

  • The rest mass of an electron is 9.11xx10^(-31) kg. Molar mass of the electron is

    A
    `1.5xx10^(-31) kg mol^(-1)`
    B
    `9.11xx10^(-31) kg mol^(-1)`
    C
    `5.5xx10^(-7) kg mol^(-1)`
    D
    `6.02xx10^(23) kg mol^(-1)`

  • If mass of an electron is 9.1xx10^(-31) kg, the number of electrons in 1 mg is

    A
    `1.09xx10^(27)`
    B
    `1.09xx10^(24)`
    C
    `9.1xx10^(28)`
    D
    `9.1xx10^(31)`

    • Similar Questions

    Explore conceptually related problems

    The mass of an electron is 9.1 xx 10^(-31) kg . If its kinetic energy is 3.0 xx 10^(25) J , calculate its wavelength.

    Calculate the mass equivalent of 1amu.

    When would the be Broglie wavelength of a moving electron become equal to that of a moving proton? Mass of electron = 9.1095 xx 10^(-31)kg and mass of proton = 1.6725 xx 10^(-27) kg

    The rest mass of an electron is 9.1 xx10^(-31) kg. Its kinetic energy when it moves with a speed of 2.4xx10^(8) m/s is

    The mass of an electron at rest is 9.1 xx10^(-31) kg. The energy of electron when it moves with speed of 1.8xx10^(8) m/s is

    Home
    Profile