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  4. A bar magnet of pole strength 10 Am is cut into two equal parts breadthwise. The pole strength of each magnet is

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Q. A bar magnet of pole strength $ 10\,Am$ is cut into two equal parts breadthwise. The pole strength of each magnet is

J & K CETJ & K CET 2013Magnetism and Matter

Solution:

When magnet is cut into equal parts, area of cross-section becomes half. hence. Pole strength becomes half.