Please explain the example 5.5, Class12 NCERT Physics, page 181.
This question is very well explained under in NCERT. Please let us know the particular step or statement in which you are facing a problem.
As we know magnetic potential energy is given by ,
Um = −mB cos θ
and potential energy is minimum (= –mB) at θ = 0o (most stable position).In the configuration PQ6 ,direction of the magnetic field of P and dipole Q6 are pointing in the same direction.So angle between them is zero degree. Therefore potential energy for this configuration is minimum.
And for all other configuration potential energy is either zero or maximum ( Um = mB).
As we know magnetic potential energy is given by ,
Um = −mB cos θ
and potential energy is minimum (= –mB) at θ = 0o (most stable position).In the configuration PQ6 ,direction of the magnetic field of P and dipole Q6 are pointing in the same direction.So angle between them is zero degree. Therefore potential energy for this configuration is minimum.
And for all other configuration potential energy is either zero or maximum ( Um = mB).