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Question

Which of the following does not affect the magnetic properties of a material?


  1. Painting  

  2. Radiation 

  3. Heat 

  4. Other magnets in close proximity to the magnet


Solution

The correct option is D

Other magnets in close proximity to the magnet


The magnetic property of magnets is subjective to change with external factors like heating, hammering etc. However painting doesn't affect the magnetic strength, as long as the thickness of the painting is small.

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