Which of these metals provide magnetic shielding?

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SUMMARY

The discussion centers on the effectiveness of different metals for magnetic shielding, specifically addressing why iron is preferred over aluminum and copper. Iron exhibits strong magnetic properties, allowing it to redirect magnetic lines of force, which results in paperclips falling when iron is introduced. In contrast, non-ferrous metals like copper do not interact with magnetic fields in the same way, allowing the magnetic lines to pass through without disruption. This understanding clarifies the marking scheme's preference for iron as the correct answer.

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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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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.
 
scottdave said:
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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