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I need proper answers for the following ( well explained and understandable writing) 1) A hollow...

I need proper answers for the following ( well explained and understandable writing)

1) A hollow copper tube carries a current along its length. Why is B =0 inside the tube? Is B nonzero outside the tube?

2)  Why does hitting a magnet with a hammer cause the magnetism to be reduced

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genius_generous answered 1 year ago
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