Methods of Magnetization and Demagnetization
 

Methods of Magnetization and Demagnetization problem 9


Which procedure may be used to demagnetise a steel bar?


  • Cooling it in a freezer

  • Earthing it with a copper wire

  • Placing it in a solenoid carrying a large direct current (d.c)

  • Striking it repeatedly with a hammer


 

main author and content editor: Odafe Adjeke