Question

Spring 2019 Final Exam ELC 131 18. For a simple R-C circuit (charging and discharge phases), label the following graphs: Vc, or ic (assume the time from 1r to 5t is the charging phase and St to 10r is the discharging phase)-DC SOURCE ONLY (NO AC) (Worth 3 points) 1Or 11r 12r 13r 14r l 19. For a simple R-L circuit (storage and release phases), label the following graphs: lt or Vi (assume the first 5t is the storage phase and the second 5T is the release phase) - DC SOURCE ONLY (NO AC) (Worth 3 points) 5(2 ms) ELC 131 Final Exam Spring 2019 20. What is the inductive reactance (X) of a Worth 3 points) 5mH inductor at 4MHz? 21 . What is the capacitive reactance (Xc) of a 1 μF capacitor at 4MHz? Worth 3 points) 22. If the voltage across a 100 resistor is u-e 40 sin(500t + 750) what is the equation (Worth 3 points) for the current through the resistor? 4sin(377t + 209) and the voltage across it is v-20 sin(377t -40)? What is the power? What is the power factor? (Be sure to indicate whether the power factor is leading or lagging.) (Worth 4 points) 23. How much power is dissipated by an R-L-C network if the current through itis i-

Answer 1

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