The electron in a hydrogen atom is moving with a spared of 2.3 ×10⁶ms^–1 in an orbit of radius 0.53Å. Calculate the magnetic moment of revolving electron.

Here, v = 2.3 × 10⁶ ms^-1

r = 0.53Å = 0.53 × 10^-10m, M = ?

Equivalent current, 

M = IA = I. (πr²)

= 1.105 × 10^-3 × 3.14 (0.53 × 10^-10)²       

= 9.75 × 10^-24 Am²