According to Bohr's atomic theory, which of the following is correct ?
(a)Potential energy of electron `propZ^(2)/n^(2)`
(b)The product of velocity of electron and principal quantum number (n) `prop-Z^(2)`
(c)Frequency for revolution of electron in an orbit `propZ^(2)/n^(3)`
(d)Coulombic force of attraction on the electron `propZ^(2)/n^(2)`

Options

A. Potential energy of electron `prop(Z^(2))/(n^(2))`
B. The product of velocity of electron and principle quantum number `(n) prop Z^(2)`
C. Frequency of revolution of electron in an orbit `prop (Z^(2))/(n^(3))`
D. Coulombic force of attraction on the electron `prop (Z^(2))/(n^(2))`

Answer

3

Explanation

`Vprop(Z)/(n),rprop(n^(Z))/(Z)`
frequency of revolution `=(V_(n))/(2pir_(n)),`
Coulombic force of attraction `=(Ze^(2))/((2piepsilon_(0))^(2))`