When an iron core is placed between the poles of a permanent magnet as shown in figure below, the magnetic field pattern is

When an iron core is placed between the poles of a permanent magnet as

1.	When an iron core is placed between the poles of a permanent magnet as shown in figure below, the magnetic field pattern is
A.	<img src="http://images.interviewmania.com/wp-content/uploads/2019/05/Capture-84-1.png">
B.	<img src="http://images.interviewmania.com/wp-content/uploads/2019/05/Capture-84-2.png">
C.	<img src="http://images.interviewmania.com/wp-content/uploads/2019/05/Capture-84-3.png">
D.	<img src="http://images.interviewmania.com/wp-content/uploads/2019/05/Capture-84-4.png">
Answer» D. <img src="http://images.interviewmania.com/wp-content/uploads/2019/05/Capture-84-4.png">

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When an iron core is placed between the poles of a permanent magnet as shown in figure below, the magnetic field pattern is

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