. Electronic apparatus for biological research. Electronic apparatus and appliances; Biology -- Research. INDUCTANCES, CAPACITANCES AND RESISTANCES The inductance current is VjiR -\-JojL) which, if R is fairly small (Q of circuit high), is approximately equal to —jVjojL. Also, if 7? is small, R <^ {LjCf^ and the resonant frequency is approximately given by co = IJiLCy^ so that coL =^ 1/coC. The capacitance and inductance currents are K Figure now seen to be equal and in opposite directions; a circulating current flows within the resonant circuit. The circulating current is jtoCV = jcoC
. Electronic apparatus for biological research. Electronic apparatus and appliances; Biology -- Research. INDUCTANCES, CAPACITANCES AND RESISTANCES The inductance current is VjiR -\-JojL) which, if R is fairly small (Q of circuit high), is approximately equal to —jVjojL. Also, if 7? is small, R <^ {LjCf^ and the resonant frequency is approximately given by co = IJiLCy^ so that coL =^ 1/coC. The capacitance and inductance currents are K Figure now seen to be equal and in opposite directions; a circulating current flows within the resonant circuit. The circulating current is jtoCV = jcoC . liLjCR) The current magnification of the circuit is Circulating current Generator current = jojLlR = JQ Physically, the circulating current represents the transfer of energy back and forth between electric field in the capacitance and magnetic field around the inductance. At each transfer some energy is lost in the resistance, and this is replaced by a small current from the generator. Impedance of parallel resonant circuit when off resonance As for the series case, this function is important in the design of tuned amplifiers. We have R-\-jojL + ^ Let JojC j(oL + R jcoCR - o?LC + 1 -jl-c) 1 /L\"2 Then Z oy^LC + 1 = oiL 1 joj{LCfl- + Q{\ - M^LC) 79. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Donaldson, Peter Eden Kirwan. New York, Academic Press
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