NEET Physics Magnetism and Matter Questions Solved


A bar magnet of magnetic moment 104J/T is free to rotate in a horizontal plane. The work done in rotating the magnet slowly from a direction parallel to a horizontal magnetic field of 4×10–5 T to a direction 60° from the field will be

(a) 0.2 J                          (b) 2.0 J

(c) 4.18 J                        (d) 2 × 102 J

Concept Videos :-

#2 | Magnetic Field & Magnetic Field Lines

Concept Questions :-

Magnetic field and field lines

Magnetic moment of bar M=104 JTB=4×10-5THence work done W=M.B=104×4×10-5×cos60=0.2 J

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