JEE Main202225 Jul 2022Morning ShiftPhysicsMagnetic Effects of CurrentActual
The magnetic moment of an electron e revolving in an orbit around nucleus with an orbital angular momentum is given by
Options
- Aμ → L = e L 2   m
- Bμ → L = - e L 2   m
- Cμ → L = - e L → m
- Dμ → L = 2 e L → m
Correct answer
B. μ → L = - e L 2   m
Step-by-step solution
When a charged body is rotating in a circle, the ratio of magnetic moment and angular momentum is given by, μ → L → = q 2 m The charge of electron q = - e μ → = - e 2 m L →