current carrying loop is placed in a uniform magnetic field in four different orientations, I,II, III & IV arrange them in the decreasing order of potential Energy
I.
I > III > II > IV
I > II >III > IV
I > IV > II > III
III > IV > I > II
As we learnt in
Potential energy of current carrying coil -
-
Potential energy
(I) angle between &
is 180; U = MB
(II)angle between &
is 90;U = 0
(III) angle between M & B is (
< 90o), U = -MB cos
(IV) angle between M & B is (
>90o), U = + MB cos
I > IV > II > III
Option 1)
I > III > II > IV
incorrect
Option 2)
I > II >III > IV
incorrect
Option 3)
I > IV > II > III
correct
Option 4)
III > IV > I > II
incorrect