TK If both the average voltage on the CSR and across the globe are negative,how do we get more power in the positive direction. So if we use our peak voltage X's our average current,and we get our average current by using ohm's law to calculate current,we would have I=V/R. So that would be -40mV/1 Or we take our peak current,and X's that by average voltage. So (about)700mV x 1ohm = 700mA. So now it is 700mA X's minus 200mV -->or do i have this wrong,and we have to use RMS voltages or something?.
How did we get on this kick of using average voltage and/or current for computing Pout? The only time you can use average voltage or current with switched circuits is when computing Pin, AND when the VDC supply is steady. As follows: Pin(avg) = Vdc (bat or psu) x I(avg). However, IF your load is a pure resistance and you have a good true rms meter (or scope), you can use the rms voltage across the resistor and compute Pout via the following: Pout(avg) = Vrms 2/R. Just make sure you know what the "hot" value of R is when you are computing the power. If the load is not purely resistive, then you must use the instantaneous method.
---------------------------
"Some scientists claim that hydrogen, because it is so plentiful, is the basic building block of the universe. I dispute that. I say there is more stupidity than hydrogen, and that is the basic building block of the universe." Frank Zappa
|