Formulas de electricidad y magnetismo

F=kq2q2

r2

k= 14 π ε0

k=9 x109 N−m2

C2

ε 0=8.85 x10−12 C2

N−m2

ε 0=8.85 x10−12 Fm

E=kq

r2

U=−q E0 y

K+U=12mv2−q E0 y=constante

E=Fq

V=−E0 y

U= 14 π ε0

q1q2

r

V= 14π ε0

qr

U=−eV

K+U=12mev

2−eV

C=Q /V

C=ε 0 A /d

C=4 π ε0R

C= 11C1

+1C2

+1C3

+… ..

C=C1+C2+C3+…

U=12ε0 E

2

U=12C V 2

E=1kE0

C=k C0

E= ΔVl

I= ΔQΔt

I=dQdt

I=1ρAE

R=ρlA

V=IR

A=π r2

∆ R=αRo∆T

R=R1+R2+…+Rn

1Req

= 1R1

+ 1R2

+…+ 1Rn

P=VI=I 2R

me=9.11 x 10−31 kg

m p=1.67 x 10−27 kg

e=1.6 x 10−19C

F⃗=q0 v⃗× B⃗

F=q0 vBsenθ

τ=NiABsenθ

∫B ∙dl=μ0 i

μ0=4 π ×10−7 T-m/A

B=μ0i

2πr

F⃗2=i2 l⃗ μ0 i1

2 ππd

B=μ0 i0n

n=N/LN = numero de vueltasL= longitud

ΦB= ∫ B⃗ d s⃗=BA

B=μ0i

2πrN

ε=−dΦB

dt

ε=−NdΦB

dt=

−d (NΦB )dt

∮ B⃗ ∙ d l⃗=−d ΦB

dt

fem=−LA∂ B∂ t

ρcobre=1.7×10−8

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