An electron revolving in an orbit of radius 0.5 A˚ in a hydrogen atom executes 10 revolutions per second. Find the magnetic moment of electron due to its orbital motion. Radius of orbit =0.50A I=TimeCharge=110×1.6×10−19=1.6×10−18 Magnetic moment =Iπr2 1.6×10−18×π×(0.5×10−10)2 1256.63×10−(38+3)=1256×10−41Am2