What is the velocity of electron present in first Bohr orbit of hydrogen atom?

Answer

A, B

Explanation

`mvr = (nh)/(2pi) `
`v = (nh)/(2pi m r)`
`= (1 xx 6.63 xx 10^(-34))/(2 xx 3.14 xx 9.1 xx 10^(-31) xx 0.529 xx 10^(10))`
` = 2.187691 xx 10^(6) m s^(-1)`