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4. Moving charges and magnetism — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics4. Moving charges and magnetism1 Mark
MCQ
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
    $I > II >III > IV$
  • ✓
    $I > IV > II > III$
  • D
    $III > IV > I > II$
✓

Answer

Correct option: C.
$I > IV > II > III$
c
(c) $U = - MB\cos \theta $; where $\theta = $ Angle between normal to the plane of the coil and direction of magnetic field.

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