Q. A 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
A) I>III>II>IV
B) I>II>III>IV
C) I>IV>II>III
D) III>IV>I>II
Explanation
(c) $U = - MB\cos\theta;$ where $\theta =$ Angle between normal to the plane of the coil and direction of magnetic field
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.