Formule circuito elettrico Flashcards by Domitilla Alessio

Q

circuitazione

A

LAMBDAlambda(E) = E vettore*As vetttore

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Q

energia potenziale elettrica

A

U= K0(Qq/r)

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Q

K0

A

1/4piepsilon0 = 8,9910^9

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Q

epsilon0

A

8,85*10^-12

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Q

potenziale elettrico

A

V= k0*(Q/r)

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Q

differenza di potenziale

A

AV= -L/q
AV= R*I

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Q

campo elettrico

A

E=- AV/As

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Q

capacità condensatore

A

C= Q/AV
C= epsilon*(S/d)

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Q

lavoro

A

L= - AU
L= 1/2C(AV)^2

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Q

intensità

A

I= Q/At

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Q

resistenza

A

R= AV/I
R= ro*(l/s)

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Q

potenza

A

P= R*I^2

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Q

costante di tempo

A

tau= R*C

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Q

ro

A

ro= ro0(1+alfa*At)

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Q

1 KWh

A

3,6*10^6 J

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Q

resistenza equivalente
(resistenze o resistori)

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A

in serie: Re= somma R
in parallelo: 1/Re=somma 1/R

Q

legge dei nodi

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A

somma I entranti= somma I uscenti

Q

legge delle maglie

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A

somma di AV=0

Q

capacità
(condensatori)

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A

in serie: 1/Ce= somma 1/C
in parallelo:

Q

legge di carica del condensatore

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A

Q(t)= Q0(1-e^(-t/RC))
con Q0= C*AV

Q

legge di scarica del condensatore

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A

Q(t)= Q0e^(-t/RC)
con Q0=CAV

Q

intensità condensatore

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A

I(t)= I0*e^(-t/RC)