Unformatted text preview: ment is said to follow the ‘passive sign convention’. If this convention is followed, then power in passive elements (also called load) will be positive and power in active elements (also called source) will be negative. i v Fig. Passive Sign convention 15 EE1002 Introduction to Circuits and Systems Circuit Elements and their i‐v characteristics The relationship between current (i) and voltage (v) at the terminals of a circuit element defines the behavior of that element within the circuit. The current flowing through the element and the voltage across it, form a unique pair of values. Thus, varying the voltage across the element, one can obtain a set of such pairs, which can be plotted to give the i‐v characteristics of the element. i v Fig. Current and Voltage associated with an element The i‐v characteristics can be expressed in functional form as i f (v ) v g (i ) The i‐v pairs can can also be plotted to obtain the i‐v curve of the element. Resistance and Ohm’s Law When electric current...
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