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    Phys 202 Midterm 2 Equations

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    Noah Graf
    This document summarizes key equations and concepts from physics chapters 26-28, including: 1) Equations for electric force, electric field, resistance of a wire, Ohm's law, power, Kirchhoff's laws, RC circuits, conservation of energy, capacitors, and series/parallel resistors and capacitors. 2) Important physical constants like the Coulomb constant, charge of an electron/proton, mass of an electron/proton. 3) Symbols and definitions for concepts like cross-sectional area, conductivity, resistivity, electron current/drift velocity, current, current density, and capacitor plate separation.

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    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd

    Phys 202 Midterm 2 Equations

    Uploaded by

    Noah Graf
    13 views1 page
    This document summarizes key equations and concepts from physics chapters 26-28, including: 1) Equations for electric force, electric field, resistance of a wire, Ohm's law, power, Kirchhoff's laws, RC circuits, conservation of energy, capacitors, and series/parallel resistors and capacitors. 2) Important physical constants like the Coulomb constant, charge of an electron/proton, mass of an electron/proton. 3) Symbols and definitions for concepts like cross-sectional area, conductivity, resistivity, electron current/drift velocity, current, current density, and capacitor plate separation.

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    This document summarizes key equations and concepts from physics chapters 26-28, including: 1) Equations for electric force, electric field, resistance of a wire, Ohm's law, power, Kirchhoff's laws, RC circuits, conservation of energy, capacitors, and series/parallel resistors and capacitors. 2) Important physical constants like the Coulomb constant, charge of an electron/proton, mass of an electron/proton. 3) Symbols and definitions for concepts like cross-sectional area, conductivity, resistivity, electron current/drift velocity, current, current density, and capacitor plate separation.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    13 views1 page

    Phys 202 Midterm 2 Equations

    Uploaded by

    Noah Graf
    This document summarizes key equations and concepts from physics chapters 26-28, including: 1) Equations for electric force, electric field, resistance of a wire, Ohm's law, power, Kirchhoff's laws, RC circuits, conservation of energy, capacitors, and series/parallel resistors and capacitors. 2) Important physical constants like the Coulomb constant, charge of an electron/proton, mass of an electron/proton. 3) Symbols and definitions for concepts like cross-sectional area, conductivity, resistivity, electron current/drift velocity, current, current density, and capacitor plate separation.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 1

    Physics 202 Chapter 26, 27, 28

    Midterm 2 – Equations and Constants


    %|' ||' |
    𝐹⃗ = *() ) 𝑟̂ = 𝑞𝐸/⃗ Resistance of Wire: 𝑅 =
    rt
    p
    𝐾|𝑞1 | Ohm’s Law: DV = IR
    𝐸/⃗ = 𝑟̂
    𝑟2 (hv))
    1 Power: 𝑃 = 𝐼 Δ𝑉 = w
    = 𝐼 2 R
    𝐾𝐸 = 𝑚𝑣 2
    2 Kirchhoff’s Laws
    𝑞
    𝑉 = 1) Current Junction Law: S Iin = S Iout
    4𝜋𝜖; 𝑟
    ' ' 2) Voltage Loop Law: S DV = 0
    ( )
    ∆𝑈>?>@A = BCD = 𝑞ΔV Series Resistors: Req = R1 + R2 + … + RN
    * E
    𝑑𝑉 1
    𝐸=− Parallel Resistors: 𝑅>' =
    𝑑𝑥 ( (
    _ _ … _
    y( y)
    (
    ya
    LM
    Δ𝑉 = − K 𝐸/⃗ Ÿ 𝑑𝑥⃗ RC Circuit: tc = RC
    LN
    A
    {|
    Δ𝐸O>@P = ΔKE + ΔU = 0 𝑄(𝑡) = 𝑄; 𝑒 }

    Capacitors A
    {
    Δ𝑉@ (𝑡) = Δ𝑉; 𝑒 |}
    𝜂 𝑄 Δ𝑉Y
    𝐸@ = = = {|
    A
    𝜖; 𝐴𝜖; 𝑑 𝐼(𝑡) = 𝐼; 𝑒 }

    Q = C DVc
    Constants/Symbols
    𝐴𝜖;
    𝐶 = K = 9 x 109 N-m2/C2
    𝑑
    C = kCo €o = 8.85 x 10-12 C2/N-m2

    𝐸/⃗; Charge electron: -1.6 x 10-19 C


    𝐸/⃗ =
    𝜅 Charge proton: 1.6 x 10-19 C
    1 𝑄2
    2
    𝑈@ = 𝐶(ΔV) = Mass electron: 9.11 x 10-31 kg
    2 2𝐶
    1 Mass proton: 1.67 x 10-27 kg
    Series Capacitors: 𝐶>' = ( ( (
    _ _ … _
    ^( ^) ^a Cross-sectional area: A = p r2
    Parallel Capacitors Conductivity: s
    Ceq = C1 + C2 + … + CN Resistivity: r
    Electron current and drift velocity Electron density: ne
    𝑖> = 𝑛> 𝐴 𝑣d
    Number of electrons: Ne
    eτ>
    𝑣d =
    𝑚
    𝐸 mean time between electron collisions: te
    hi >kl Capacitor plate separation: d
    Current: I = 𝐼 = = 𝑒𝑖>
    hA ∆A Dielectric constant: k
    o 1
    Current Density: 𝐽 = = 𝜎𝐸 𝜎=r Capacitor decay time constant: tc
    p

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