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Ellära HT22 åk 9

TermDefinition
likström Elektrisk ström som alltid har samma riktning
växelström Elektrisk ström som hela tiden byter riktning
seriekoppla Ett sätt att koppla i en krets då komponenter sitter i serie (i rad) med varandra.
parallellkoppla Ett sätt att koppla i en krets då komponenter sitter parallellt med varandra
elektroner Negativt laddade partiklar
pluspol Den del av batteriet som har ett underskott på elektroner
minuspol Den del av batteriet som har ett överskott på elektroner
spänning Skillnaden i elektrisk laddning mellan pluspol och minuspol.
ström Elektroner som rör sig i ledning
volt Enhet för spänning, V
ampere Enhet för ström, A
ledare Samlingsnamn för material som leder ström.
isolator Samlingsnamn för material som inte leder ström
resistans Ett annat ord för motstånd. I en ledare gör den så att den elektriska energin omvandlas till värmeenergi.
ohm Enheten för resistans, Ω
kortslutning När elektricitet inte tar den vägen som var tänkt utan orsakar problem.
säkring En modernare typ av säkring som bryter den slutna kretsen när strömmen blir för hög.
jordfelsbrytare Den gör så att strömmen slår ifrån snabbt om strömmen tar fel väg. Till exempel genom en människa.
Created by: martinelineberg
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