AP EAMCET202018 Sep 2020Morning ShiftPhysicsMagnetic Effects of CurrentActual
A magnet of magnetic moment (M ) is rotated through (360^ ) in a magnetic field (H ), the work done will be
Options
- A( MH )
- B(2 M H )
- C(2 M H )
- D0
Correct answer
D. 0
Step-by-step solution
Work done to rotate magnetic dipole in magnetic field from angle ( ₁ ) to ( ₂ ) is given as (W=M B ( ₁- ₂ ) ) Here, ( ₁=0^ ) and ( ₂=360^ ) ( W=M B ( 0^ - 360^ )=M B(1-1)=0 )