ECE 111 Midterm: ECE 111 University of Rochester Exam1 07

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This is a closed-book examination, but you may use a hand-held calculator. Do all work in the exam booklet provided, clearly indicating your answers. Partial credit is more likely for neat, well-organized writing. In your answers, do not overstate or understate precision of numerical values. Consider the circuit below, which has three resistors & a voltage source. Find the open-circuit voltage and the short-circuit current, that is, v(i = 0) and i(v = 0). Plot the v-i characteristic graph for the circuit, carefully labeling any important points. Use loop analysis (not nodal analysis) for the circuit below. Copy this ckt into your exam booklet & then, on this diagram, define the three (3) independent loop currents, using the clockwise convention. (b) use loop analysis & kvl to obtain equations involving these currents. Nb: do not attempt to solve for the currents. Find an expression for the current i defined in the resistive circuit below using the superposition principle.