Unformatted text preview: v /∆ t ∆ t = C ∆ v / i = (2000E-6)(100)/(100E-6) = 2000 sec P3.36 Describe the construction of inductors. Answer – Inductors consist of coils of wire wound on coil forms such as toroids. P3.37 – If the current through an inductor is decreasing in magnitude, is the energy flowing into or out of the inductor? Answer – Because the energy stored in an inductor is W= ½Li 2 , the energy stored in the inductor decreases when the current magnitude decreases. Therefore, the energy is flowing out of the inductor. P3.38 – If the current through an inductor is constant, what is the value of the voltage across the inductor? Explain why. Answer – Because v L ( t ) = L di L ( t )/ dt , the voltage is zero when the current is constant. Thus we say that inductors act as short circuits for steady DC currents....
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This note was uploaded on 09/24/2011 for the course E E 331 taught by Professor Staff during the Fall '08 term at University of Texas.
- Fall '08