calc_power_diss

# calc_power_diss - Calculating Power Dissipation The passive...

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1 Calculating Power Dissipation The passive sign convention ( really important! ) When we observe that positive current enters the positive terminal of a component, we say that the component obeys the passive sign convention (PSC). Therefore, when the passive sign convention is being obeyed, it indicates that a component is dissipating energy (or power) as charge is being displaced from a higher potential to a lower potential. One way to think about this is using another water analogy. If we splice a garden hose in a length of ﬁrehose we create a pressure potential. The high pressure side is the one where the water is enter- ing. The garden hose is analogous to a resistor which impedes the ﬂow of current. Thus, when current ﬂows through a resistor, a higher voltage potential will exist on the incoming current side. In this example, the garden hose and the resistor are obeying the passive sign convention.

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## This note was uploaded on 04/17/2010 for the course ECE 112 taught by Professor Traylor during the Winter '09 term at Oregon State.

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calc_power_diss - Calculating Power Dissipation The passive...

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