Jee advanced 2020 angular momentum conservation question solved by best trick ever in 2 minutes.

Angular momentum is conserved

The angular momentum of body remains conserve if :

The conservation of angular momentum demands that

The angular momentum of a system of particles is conserved

The orbital angular momentum of an electron in 2s -orbital is

The orbital angular momentum of an electron in 2s -orbital is

The orbital angular momentum of an electron in 2s orbital is ………

(I) What is the condition of angular momentum conservation? (ii) A man sets on a sprining piano with his arms folded. If he extends his arms, what happens to his angular velocity?

For of particles under central forcer field, the total angular momentum is conserved. The torque acting on such a system is zero.

The orbital angular momentum of an electron of an electron in 2s orbitals is