Elettricità Flashcards

1
Q

Legge di Coulomb e costante dielettrica

A

F = ko (Q1 Q2/r²)
ko = 1/(4πeo)
er = Fo/F. e = eo/er

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2
Q

Energia potenziale elettrica

A

U = qEy
U = (qQ)/(4πeor)

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3
Q

Due sfere conduttrici collegate

A

q1 = Qr1/(r1+r2)
sigma = q1/(4πr1²) = Q/(4πr1(r1+r2))

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4
Q

Campo elettrico e capacità del conduttore

A

E = sigma/eo
C = Q/Vo = 4πeoR

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5
Q

Campo elettrico e moto di una carica tra le armature

A

E = sigma/eo. ∆V = Ed
C = eoS/d. C = erCo = eS/d
a = qE/m

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6
Q

Intensità di corrente e prima legge di Ohm

A

i = ∆Q/∆t.
i = ∆V/R

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7
Q

L’energia e la densità di energia di un conduttore

A

Wc = 1/2Q∆V = 1/2C∆V²
we = 1/2eE² = Wc/Sd

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8
Q

Effetto Joule

A

P = Ri² = i∆V
∆E = Q → i∆V∆t = mc∆T

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