Find the separation between two electron (in`Å`) in vacuum, if electrostatic potential energy between these electrons in `7.67xx10^(-19))J`.
[Given: e= `1.6xx10^(-19)C` `in_(o)=8.85xx10^(-12)` J^(-1)` `C^(2)m^(-1)` pi=3.14]`

The electrostatic potential energy between proton and electron separated by a distance 1 Å is

The energy of an electron is 4.0 xx10^(-19) J.Express it in eV.

Find de-Broglie wavelength of electron with KE =9.6xx10^(-19)J .

If de Broglie wavelength of an electron is 0.5467 Å, find the kinetic energy of electron in eV. Given h=6.6xx10^(-34) Js , e= 1.6xx10^(-19) C, m_e=9.11xx10^(-31) kg.

Determine the mass of an electron if for an electron e/m=1.759 xx 10^(8) Cg^(-1) and e=1.6021 xx 10^(-19)C

An electron is accelerated under a potential difference of 64 V, the de-Brogile wavelength associated with electron is [e = -1.6 xx 10^(-19) C, m_(e) = 9.1 xx 10^(-31)kg, h = 6.623 xx 10^(-34) Js]

Calculate the ratio of electric and gravitational force between two protons. Charge of each proton is 1.6 xx 10^(-19)C , mass is 1.672 xx 10^(-27)kg and G= 6.67 xx 10^(-11) Nm^(2) kg^(-2) .

Calculate the ratio of electric and gravita-tional forces between two electrons. (charge of the electron (e) = 1.6 xx 10^(-19) c , mass of the electron (m) = 9.1 xx 10^(-31) kg, (1)/(4pi epsilon_(0)) = 9 xx 10^(9) Nm^(2)C^(-2) , universal gravitational constant G = 6.67 xx 10^(-11) Nm^(2) kg^(-2) )

The electrostatic potential energy between two identical nuclei produced in the fission on of ._(92)^(238)U at the moment of their separation is x then find x//180 . Given R_(0)=1.3xx10^(-15)m and epsilon_(0)=8.85xx10^(-12)Fm^(-1) .