 Inductance 03 - Energy Stored in the B Field of an Inductor SAFARI DIRECTOR: Ian   ════════════════════ OPENING QUESTIONS: There is a recurring *style* of equation for various types of energy. Comb your thoughts and see if you can suggest what that might be.     Hint: 1/2kx2, 1/2mv2   With that in mind, please suggest an equation for calculating the energy stored in the magnetic field of an inductor. OBJECTIVE:  I will be able to calculate energy stored in the magnetic field of an inductor during today's class. WORDS/FORMULAE FOR TODAY TERMS self induction/back emf Inductance solenoid ("A coiled wire with n loops per unit length") CONSTANTS:   UNITS: henry = (volt)(sec)/amps FORMULAE: UB = 1/2Li2 εL = L(di/dt) Kirchoff Amended: ε - iR - L(di/dt) = 0 B = μonI n = number of loops per unit length I = current εL = -L(di/dt) AP = -L(dI/dt) dI/dt = change in current L = propotionality constant depending on the "geometry of the loop and other physical characteristics" L = NφB/i N = number of loops (or coils if you prefer) i = current that may vary with time (hence the lower case) WORK O' THE DAY:  Please write the full form of Kirchoff's Law (include inductance) How many OTHER equations do we have for EMF? ════════════════════ Coursework: Problem 15 and 19 on page 990 STUDY GUIDE: