Electromagnet

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The electromagnet is a type of magnet in which magnetic field is produced by passing an electric current. The magnetic field disappears when the current ceases to pass through.

Educational phase: fixation

 

Required aids+

  • electromagnet
  • battery
  • switch
  • connecting wires
  • paper clips.

 

Experiment instructions+

E115_S001 Connect the solenoid to the battery through the switch.
E115_S002 Below we deploy eletromagnet paperclip.
E115_S003 Closes switch. Staples are attracted to the electromagnet.
 

Explanation+

When electric current passes through the loop, it creates a magnetic field. The orientation of this field can be determined by the right-hand rule.
 

Experiment video+

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Physical interpretation+

The electromagnet is a coil with a core of magnetically soft steel, used to create temporary magnetic field. The principle consists in the conversion of the electromagnetic field energy into mechanical energy. The magnetic field of the electromagnet is the stronger, the greater the electrical current through the coil and the coil has more turns.

The electromagnet is a type of magnet in which magnetic field is produced by passing an electric current. The magnetic field disappears when the current ceases to pass through.
 

Application in practice+

Electromagnet is used as an electric bell in circuit breakers, contactors, in the metallurgical industry, collection of scrap metal or electromagnetic relays. Electromagnet is used, among other things, also in the automotive industry such as the crankshaft speed sensor, or brake tram cars, machine tools and healthcare.
 
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This experiment has been added 14.4.2012 by Jan Krejčí and since then have 14037 visits.
 
3.6.2014 21:44 © Krejčí Jan
 
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