Physics-
General
Easy

Question

If a bar magnet of length land cross-sectional area A is cut into two equal parts as shown in figure, then the pole strength of each pole becomes

  1. Half    
  2. Double    
  3. One-fourth    
  4. Four time    

The correct answer is: Half


    Pole strength depends on material of magnet, state of magnetization and cross-sectional area. As m proportional to A comma so if Abecomes half, pole strength gets half.

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