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The rise and decay of current through an in ductor

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## The rise and decay of current through an in ductor

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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**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 LI2**Formula for decaying inductor current**a. Imax = V/R b. Time constant, = L/R c. Decaying current, I = Imax (e -t/ )