Guide

Whathappenswhen
youmovetheironbar
towardstheholeofthe
energized100-turncoil?
Whathappenswhen
youmovetheironbar
towardstheenergized
100-turncoil(withplastic
core)?
Whathappenswhen
youmovetheironbar
towardstheenergized
100-turncoil(withiron
core)?
Your
answer:
1 2 3
Your
answer:
Your
answer:
5 6
7
Batteryholder
Battery
holder
100-turncoil
Afterthewirehasbeenwound,
winditaroundthestoppertwice,
thenthecoilisfinished.
Tieuptheextraenameled
wirewithtape.
Slot
Connection
plug
Connection
plug
Connectionplug
Batteryholder
○Theassembledelectromagnet
Let'sdothreeexperiments
withtheelectromagnet!
Attachaconnectingplugtothefreeendoftheenameled
wire.Tieuptheextraenameledwirewithtape.
TurningtheswitchONallowscurrenttoflow.
⑤Plasticcore⑬Ironcore⑭Ironbar
g
g
g
g
g
Choosethecorrectanswer
beforedoingtheexperiments.
DonotkeeptheswitchON.
Otherwise,theelectromagnet
willbecomeveryhot.
Takethebatteryoutafterthe
experimentisfinished.
Warning
Dontcutawayanyexcessenameledwire;
theresistancewillbereducedand
consequentlycausedashortcircuit.
Warning
Threadthewireend
throughtheholeto
about4cmand
folditback.
Winditaround
theplug
severaltimes.
Howtoattach
theconnecting
plugstothe
enameled
wires
1. 2.
Enameledwire
4cm
Insertall
theway
Insertall
theway
Turn
ON!
Whatyouneed
fromthekit:
Experiment
A
B
C
Theironbargetspulled
towardtheholeofcoil
Theironbarisrepulsed
Nothinghappens
A
B
C
Theironbarisattracted
totheplasticcore
Theironbarisrepulsed
Nothinghappens
A
B
C
Theironbarisattracted
totheironcore
Theironbarisrepulsed
Nothinghappens
4
What is an Electromagnet?