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21 Cards in this Set
- Front
- Back
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Force
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F=1/[4πƐo] * qq/r^2
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1/[4πƐo], aka Coulomb's law constant
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9e9
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Electric field
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E=F/q
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E (when dealing with electricity) stands for what?
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Electric field (NOT ENERGY)
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Potential energy (electric field)
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U(E)=qV=1/[4πƐ] * qq/r
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Electric field (avg)
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E(avg)=-V/d
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Capacitance
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C=Q/V = (Ɛo*A)/d
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Ɛo, aka vacuum permittivity
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8.85e-12
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Potential energy (capacitors)
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U(c)=½QV=½CV^2
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Current (avg)
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I(avg)=ΔQ/Δt
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Resistance
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R=pL/A
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2 basic circuit equations
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V=IR
P=IV |
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Adding capacitance in circuit-esque things
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In parallel, sum = total
In series, sum of inverses = inverse of total |
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Adding resistance in circuits
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In parallel, sum of inverses = inverse of total
In series, sum = total |
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Force (magnetic field)
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F(B)=qvBsinθ (particles)
F(B)=BILsinθ (wires) |
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Magnetic field
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B=[μo/2π]*I/r
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μo, aka vacuum permeability
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4πe-7
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μo/2π
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2e-7
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Magnetic flux
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ϕ(m) = BAcosθ
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Induced voltage
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Ɛ(avg)=Δϕ(m)/Δt
Ɛ=BLv |
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Ɛ stands for what? (magnetism)
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Induced voltage
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