Materials and Components - Engineering

Q1:

If v is velocity of electron, ε0 is absolute permittivity, m is mass of electron, e is charge on electron and r is the radius of orbit of electron in hydrogen atom, the stability of orbit requires the following equation to be satisfied

A

B

C

D

ANS:B -

Centrifugal force is equal to and coulomb force is equal to . For stability they must be equal.