ECE385H1 Study Guide - Final Guide: Phasor, Damping Ratio, Voltage Source
20 Nov 2012
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December 5, 2008: policy: closed book, calculators allowed. Show all work: work in the provided space, the exam has 3 problems and 12 pages, including the cover page and extra sheet. In the circuit below, the switch has been closed for a long time. At t=0, the switch moves from closed to open position vc (t) il(t) [6 points] find the phasor vx2, corresponding to the sole contribution of the. [5 points] find the phasor ix2, corresponding to the sole contribution of the voltage source to the phasor current ix. (d) [3 points] find vx(t), and ix(t) In the following, all op-amps are ideal and no energy is stored initially in any of these circuits. 1 s a+ f t ( )u t ate u t. Useful laplace transform pairs f t ( )f s f t ( )f s f t ( )f s ( )t . 1 sin bt u t at te u t.
