Physics II equations

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Author:
lacythecoolest
ID:
287300
Filename:
Physics II equations
Updated:
2014-10-28 02:54:21
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physics college
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Description:
college physics II equations for exam II
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  1. dissipating capacitorĀ at t=0 and beyond
    current
    change Vc
    RC
    Q
    • I= E/R````A=V/ohms
    • Q=(E)(Cap)``````C=VF
    • change Vc=(changeVc)initial(e^-t/RC)
    • I=Iinitial(e^-t/RC)
    • RC=decay=0.0001 seconds
  2. Charging capacitor V & I
    • I=Iint(e^-t/RC)
    • changeVc=E(1-e^-t/RC)
  3. propagation
    V=m/s
  4. magnetic field w/straight wire
    UoI/2piR
  5. magnetic field loop center
    UoI/2R
  6. magnetic field loop radius
    UoI/2piB
  7. magnetic field of coil
    NUoI/2R
  8. magnetic field solenoid
    UoIN/L
  9. magnetic field strength & direction w/different wires @ points
    • B=(UoI/2piR) + (UoI/2piR)
    • wire 1 + wire 2
    • signs indicate direction
  10. magnitude & direction of angled wire in magnetic field
    • ILBsin@=N
    • sign indicates direction
  11. Torque
    IABsin@
  12. electric potential difference btwn ends w/electric field
    V/m*m=Vdiff
  13. Power equation
    • IV=P
    • AV=W
  14. Resistor addition for parallel
    (1/ohms+1/ohms....)^-1
  15. resistor addition for series
    ohms1+ohms2.....
  16. Capacitance addition for parallel
    C1+C2....
  17. Capacitance addition for series
    (1/C1+1/C2...)^-1
  18. Reducing and expanding resistors
    • 1. start from outside
    • 2. expand closest resistors
    • 3. subtract inside series currents for outside parallel resistor currents
    • series=same volts
    • parallel=same current
  19. decay equation
    • weird T=RC
    • ohms(F)
  20. Charge difference over time equation(q)
    q=change(t)(I)
  21. kirchoff's junctions
    • 1. add incoming
    • 2. subtract known outgoing=other sides outgoing
    • 3. subtract outgoing from incoming for sideways current
  22. electrical potential equation
    • change of q * change of V= J
    • C*V
  23. Resistance equation with material list
    pL/A
  24. Resistance equation with V & I
    V/A=ohms
  25. Area, radius vs diameter
    • 2piR^2
    • pi(D/2)^2
  26. current equation with resistor
    I=change of V/R

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