JEE Main 2017 Physics question
According to Bohr's theory, the time averaged magnetic field at the centre (i.e., nucleus) of a hydrogen atom due to the motion of electrons in the orbit is proportional to: ( = principal quantum number)
Answer: (4)
Solution
Treat the orbiting electron as a circular current loop of radius . The equivalent current is the charge passing a point per revolution,
I = = ,
and the field at the centre of such a loop is
B = = .
Bohr's results give the scalings \propto$
See the full step-by-step solution
Create a free account to read the complete working (7 steps), and practise questions like this in a timed test.
Create a free account