Test1 Notes

# Test1 Notes - Does an ideal voltage source always absorb...

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Does an ideal voltage source always absorb negative power? No. If V s I s is positive and PSC is obeyed, negative power is supplied. Is the power provided by an ideal source always positive? No. Significance of Thevenin’s resistance: equivalent resistance between two terminals when all the independent sources are turned off. Power absorbed by an independent source can be negative or positive. What is supernode and when is it formed? Consists of all the nodes interconnected by voltage sources. It is formed when voltage sources don’t share the reference node. What is meant by a linear circuits element? i-v curve is a straght line. Two resistors in parallel, same two in series. Which setup does voltage provide more power? Parallel setup. Current: Rate of flow of charge. Always shown by an arrow and algebraic value in units of Amperes (A). Voltage: Work per unit charge. Always specified between two terminals and shown by polarity and algebraic value. Units are Volts (V). Alternatively shown by assigning two subscripts, the latter subscript being the reference. For example, V ab is the voltage of terminal a with respect to terminal b. If a common reference has already been

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