
Fys9 Ellära
Authored by Lars Wingård
Physics
9th Grade
Used 6+ times

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11 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
En glödlampa kopplas till ett batteri med spänningen 4,5V. Hur stor är elströmmen genom lampan då dess resistans är 15Ω?
I=67,5 A
I=0,3 A
I=3,33 A
I=30 mA
I=333 mA
2.
FILL IN THE BLANK QUESTION
3 mins • 1 pt
Beräkna elströmmen i enheten mA.
3.
OPEN ENDED QUESTION
3 mins • Ungraded
Varför parallellkopplas batterier? Ge EN förklarning. Två förklarningar behövs inte.
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4.
FILL IN THE BLANK QUESTION
3 mins • 1 pt
Hur stor är spänningen över lampan?
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Vilken sorts koppling har vi använd på batterierna?
Parallellkoppling
Seriekoppling
Sidokoppling
Elektrisk koppling
Parallellserie
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Två elmotorar har resistansen 50 Ω. De kopplas parallellt. Vad är motorsystemets totalresistans?
50 Ω
100 Ω
25 Ω
500 mΩ
5 Ω
7.
FILL IN THE BLANK QUESTION
2 mins • 1 pt
Elströmmen vattenkokaren är 4 A. Vad är vattenkokarens effekt?
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