Magnetism Question 165

Question: A bar magnet having centre O has a length of 4 cm. Point P1 is in the broad side-on and P2 is in the end side-on position with OP1 = OP2 = 10 metres. The ratio of magnetic intensities H at P1 and P2 is

[MP PET 1990]

Options:

A) $ H _{1}:H _{2}=16:100 $

B) $ H _{1}:H _{2}=1:2 $

C) $ H _{1}:H _{2}=2:1 $

D) $ H _{1}:H _{2}=100:16 $

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Answer:

Correct Answer: B

Solution:

Magnetic intensity on end side-on position is twice than broad side on position.