2. End of the lessons, student should be able to ; Explain the rise and the fall of the current versus time graph. Formulate the related equation for rise and decay of current through an inductor. Determine the time constant,  = L/R. Identify its value by: a. Graph b. Equation Determine the energy stored in an inductor. Solve problems on inductors

3. RISE AND DECAY OF INDUCTOR CURRENT

5. Rise of inductor current : switch to a

6. Formula for rising inductor current a. Imax = V/R b. Time constant,  = L/R c. Rising current, I = Imax (1 - e -t/  ) d. Energy stored in Inductor E = ½ LI 2

7. Decaying of inductor current : switch to b

8. Formula for decaying inductor current a. Imax = V/R b. Time constant,  = L/R c. Decaying current, I = Imax (e -t/  )

9. Example of Final Exam question