Matematik- och fysikprovet 2021 Fysikdelen — svarsformulär
Chalmers — GU — KTH — SU — UU
Namn: ………
Personnummer: ……….
Resultat meddelas endast via email.
Uppgifter med svarsalternativ Ringa in rätt svar.
1. A B C D 2. A B C D 3. A B C D 4. A B C D 5. A B C D 6. A B C D 7. A B C D
8. A B C D 9. A B C D 10. A B C D 11. A B C D 12. A B C D 13. A B C D
Uppgifter till vilka endast svar skall ges
14. ……….
15. ……….
16. ……….
17. ……….
18. ……….
19. ……….
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x(T ) = x0ev0Tx0
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1 kWh = 3.6 MJ
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5 g
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f 12
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3 8
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e2
✏0~c
20. De 6 punkterna kan ritas enligt figuren, d¨ar den s¨okta resistansen RAB¨ar mellan A och B. F¨orutom de resistanser som ¨ar utskrivna ¨ar alla punkter C-F f¨orbundna med varandra med resistansen R. Dessa kopplingar kan avl¨agsnas, d˚a de f¨orbinder punkter med samma potential, d˚a en sp¨anning l¨aggs mellan A och B. D¨arf¨or f˚as den s¨okta resistansen genom parallellkoppling av ett motst˚and med resistansen R och fyra med resistansen 2R, allts˚a
RAB= 1
1
R+ 4×2R1
= R 3 .
R
A B
R R
R R
R
R R
R
