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16
Inkjetprinteroperation
PartI
---Positivelychargeddropletsareattractedbythenegativelychargedbottom
plate.Thedropletsgodownwardsandhitthesheetbelowthefirstpoint.
---Positivelychargeddropletsareattractedbythenegativelychargedtop
plate.Thedropletsgoupwardsandhitthesheetabovethefirstpoint.
-1-Positivelychargedinkdropletsareshotbetweenunchargedplates.
---Thechargeontheplatesischanged.
---Thetopplateispositivelycharged,thebottomplateisnegativelycharged.
---Thentheplatesarecharged.
---Thedropletsgostraightandhitthesheetinthemiddle.
---Thetopplateisnegativelychargedandthebottomplateispositively
charged.
III.Grammar
A.Analyzethepictureandtheflowchartwhichexplainstheoperation
ofagoldleafelectroscopeandcompletethedescriptionusing
PassiveVoice.
PassiveVoiceinPresentSimple
Dust
Theinstrument
Thechargedbody
Electrons
Manyappliances
areearthed
Anelectricarc
Who/What
is
is
is
maybe
are
canbe
maybe,canbe,
shouldbe,etc.
Verbs:is,are,
attracted
charged.
put
pulled
earthed.
avoided
PastParticiple
tothemonitor.
closelytothe
unchargedbody.
throughtheair
byanother
object.
byearthing.
Object
