A et U Flashcards

1
Q

Voltemètre

A

DCV • VOLTS • MAX 20
fil noir= COM
fil rouge= V/Ω

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2
Q

Voltemètre dans courant alternat

A

ACV • VOLTS • MAX 200

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3
Q

Ampèremètre

A

DCA • 20m-10A
fil noir = COM
fil rouge = 10 A

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4
Q

Mesurer la différence de potentiel

A

Aux bornes de la source de courant, aux bornes de l’ampoule et aux bornes du resistor (En serie)

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5
Q

En serie

A

I est pareil partout
U se divise ( U ampoule + U autres)

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6
Q

En parallèle

A

I se divise (I ampoule + I autres)
U est pareil partout

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7
Q

La loi d’Ohm

A

U= R x I

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8
Q

La résistance équivalente

A

En serie| Rt = r1+r2+r3
En parallèle| 1/rt= 1/r1+ 1/r2+…

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