EE202_2 - 8/31/2009 Electric Current Denoted by i or I...

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8/31/2009 1 Electric Current Denoted by i or I rrent Change in Q Current = Change in t dq dt i A Conventional Current The motion of positive charge In conductors charge is transported by free electrons, however there is a difference etween considering the current flow as between considering the current flow as positive for positive charge Current Flow Specified by an arrow and a number specifying the magnitude Arrow does not indicate the actual direction of current flow but the direction of conventional current if the algebraic sign of the current value is positive We can reverse both the sign and direction of the urrent without changing either it’s value or direction current without changing either it s value or direction Total Charge Flowing t t t dq dt dq idt dq i Total charge flowing in time t = t - t o t t T o t t t o o o o idt q t q t q dt dt ) ( ) (
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8/31/2009 2 Total Charge Waveforms 0 1 2 3 4 5 Current
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EE202_2 - 8/31/2009 Electric Current Denoted by i or I...

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