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.

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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

RISE AND DECAY OF INDUCTOR CURRENT

Rise of inductor current : switch to a

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

Decaying of inductor current : switch to b

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

Example of Final Exam question