Question

The magnetic field at the centre due to motion of electron in the second orbit is B . The magnetic field due to motion of electron in the third orbit is ?????

Answer 1

mvr=nh/2π

r=mv/Bq

mv=Bqr

Bqr²=nh/2π

B=nh/2πqr²

now substitute n=3 in this formula and other value s to get the answer

I hope this helps