Methods of Magnetization and Demagnetization
 

Methods of Magnetization and Demagnetization problem 13


What will be the least successful method of magnetising a steel bar?


  • Insert the bar in a coil with a large direct current

  • Place the bar at right angles to a weak magnetic field and hit it with a hammer

  • Place the bar parallel to a strong magnetic field, heat it and let it cool

  • Stroke the bar with a magnet


 

main author and content editor: Odafe Adjeke