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AP EAMCET2011PhysicsMagnetic Properties of Matter

If a bar magnet of pole strength m and magnetic moment M is cut equally 5 times parallel to its axis and again 3 times perpendicular to its axis, then the pole strength and magnetic moment of each piece are respectively

Options

  1. Am 20 , M 4
  2. Bm 5 , M 20
  3. Cm 6 , M 24
  4. Dm 5 , M 24

Correct answer

C. m 6 , M 24

Step-by-step solution

Given, pole strength =m and magnetic moment =M When it is cut 5 times parallel to its axis, pole strength, m^ = m 6 When it is cut 3 times perpendicular to its axis, then length 2 l^ = 2 l 4 pole strength, m^ = m 6 and magnetic moment, M^ = ( m 6 ) ( 2 l 4 )= M 24

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