Which of these metals provide magnetic shielding?

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Homework Statement


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This a question from an olevel paper and the marking scheme says B
I don't understand why

Homework Equations


None a theory question

The Attempt at a Solution


Aluminum and copper has less magnetic property while iron is good magnetic material. I cannot understand why the paper clips should fall when iron is inserted and not fall when copper is inserted.
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Answers and Replies

  • #2
scottdave
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The magnetic lines of force pass through non magnetic materials like the cardboard and non-ferrous metals. They interact with magnetic metals like the iron in the paperclips. But a sheet of magnetic metal will cause the lines of force to redirect, and they are no longer passing through the paperclips.
 
  • #3
273
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The magnetic lines of force pass through non magnetic materials like the cardboard and non-ferrous metals. They interact with magnetic metals like the iron in the paperclips. But a sheet of magnetic metal will cause the lines of force to redirect, and they are no longer passing through the paperclips.
Thank you very much
 

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