Guide

1 2 3
Theironcorebecomesastrong
magnetbecauseitallowselectrical
currenttoflow.
Theironbarsare
attractedtothecoil
Theironbarsarenot
attractedtothecoil
Let'scheckthepicturesbelow!Youcanseethere
ismagneticforcepresentbecauseitmakesthe
ironfilingscreateacirclearoundthemagnet.This
isvisibleproofthatthemagnetattractstheiron
filings.Theforcethatattractstheirontothe
magnetiscalledmagneticforce.
Whenthecoiliscarryinganelectriccurrent,
itattractsironlikeamagnet.Whenthecoilis
notcarryinganelectriccurrent,nothing
happens.
Whenthecoiliscarryinganelectriccurrent,
itattractsironlikeamagnet.Whenthecoilis
notcarryinganelectriccurrent,nothing
happens.
LetthecurrentflowLetthecurrentflow StopthecurrentStopthecurrent
Justlikeabar
magnet,anelectric
magnethas
magneticforce.
B B
C
Nothinghappens Theironbargetspulled
towardtheholeinthecoil
Theironbarisattracted
totheironcore
Nothinghappens Theironbargetspulled
towardtheholeinthecoil
Theironbarisattracted
totheironcore
Results
5
What is an Electromagnet?