Force exerted on a point charge moving in a B and E field, magnetic and electric field.

F = q(E + v x B)

Electric field generated by a point charge.

E = (1 / 4 π ε

_{0}) Q / r 2
Δ V = ∫ E . dl = k Q / r = Q / C

Work done by an electric field.

Work = ∫ q E . dl = q Δ V

Power done by an electric field

Power = d Work / dt = dq Δ V / dt

Power = I Δ V

Power = I

^{2}R = V^{2}/ R (in situations where ohm's law applies)
Ohm's Law

V = I R (ohm's law)

e = 1.6 x 10

^{-19}Coulomb
1eV = 1.6 x 10

^{-19}Joule
= 11,600

^{o}K
Properties of Temperature

1/40 eV ≈ 300

^{o}K = 4140 Yocto-Joules
13.8 Yocto-Joule = 1

^{o}K
Constants

ε

_{0}= 8.85 x 10^{-12}Coulomb / Volt m = 8.85 pF / m
k = 1 / 4 π ε

_{0}= 9 x 10^{-9}Volt m / Coulomb
μ0 = 4 π x 10

^{7}T m / A
c = 0.3 x 10

^{9}m / s
When E is energy in electron volts

Ε = h fλ = 1240 nm (Ε / 1eV)

^{-1}
f = .24 x 10

^{15}(Ε / 1eV)
Masses

m

_{e}= .511 MeV / c^{2}
m

_{p}= .938 MeV / c^{2}
N

_{a}= 6.02 x 10^{23}
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