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Bar Magnets

When a horse-...

Question

When a horse-shoe magnet is dipped in iron fillings, the attraction of the magnetic material by the poles of the magnet is:

A

maximum

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B

zero

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C

minimum

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D

can’t say

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Solution

The correct option is A maximum
A U-shaped or a horse-shoe magnet has two open ends which serve as poles. A magnet has maximum attractive property at its two ends and zero attractive property at its center. When a horse-shoe magnet is dipped in iron fillings, the maximum number of iron fillings clings at the two ends of it as shown in the figure below.

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