Question

the current due to revolution of electron in 1st orbit of hydrogen atom is

Answer 1

We know that , Current = Charge / Time

Time = Distance / velocity = 2*pi*r/ v

Charge of electron = 1.6*10^-19 C

Radius of first bohr orbit of hydrogen (r) is 0.529 Angstrom = 0.529 * 10^-10 m

Velocity of electron in first orbit of hydrogen atom (v) = 2.16 * 10^6 m/s

Current = 1.6*10^-19 / (2 * 3.14* 0.529 * 10^-10 / 2.16 * 10^6

= 1.6 * 10^-19 / 1.54 *10^-16 = 1 * 10^-3

Therefore, value of current is 1 mA