Physics Chapter 23 (after test)

• Energy stored in an inductor E(ind)= 1/2LI^2
• Inductors in parallel add reciprocally
• Inductor in series add
• Impedance is the combined effect of resistance, inductive reactance, and capacitive reactanced
• Reactants vary with frequency with XL large at high frequencies and Xc large at low frequencies
• XL - the inductive reactance

  XL = 2pifL          units: ohms
• Xc - the capacitive reactance

  Xc = 1/2pifC         units: ohms
• Impedance units: ohms
• Energy stored in an inductor: Eind= 1/2LI^2