Q. A uniform magnetic field parallel to the plane of paper, existed in space initially directed from left to right. When a bar of soft iron is placed I the field parallel to it, the lines of force passing through it will be represented by figure.
A) [image:5_image1.emf]
B) [image:5_image2.emf]
C) [image:5_image3.emf]
D) [image:5_image4.emf]
Explanation
(b) Because of large permeability of soft iron, magnetic lines of force prefer to pass through it. Concentration of lines in soft iron bar increases as shown in Fig. (b).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.