Resistor-Inductor Circuits

Figure 2.19. Graphical representation of the AC impedance of a series RC circuit 2.4.2 AC Impedance of a Resistor-Inductor Circuit...

For vibration reduction of panels mostly, semi-active vibration damping systems based on piezoelectric transducers have been studied. The piezos are attached to the structure and electrically shunted with resistor-inductor circuits. By proper tuning of the circuit elements, effects compared to the application of mechanical vibration absorbers can be observed, however only laboratory experiments have been performed yet [147]. 

In a parallel resistor-inductor (RL) circuit (R/L), the overall AC impedance, ZRIL, can be expressed as... 

Receiver coil. An inductor in a resistor-inductor-capacitor (RFC) circuit that is tuned to the Larmor frequency of the observed nuclide and is positioned in the probe so that it surrounds a portion of the sample. 

Each NMR instrument has a depth gauge to allow us to position the NMR tube correctly with respect to the spinner. Figure 2.1 shows the correct spatial relationships between the tube, the spinner that holds it, and the region of the NMR tube that will occupy the probe s detector (a coil of wire that is an inductor in a resistor-inductor-capacitor circuit) when the spirmer-tube assembly is in the instrument. Note that not all of the sample volume occupies the detected region. 

Vand I are waveform amplitudes for potential and current, respectively, and Z is defined as the impedance and represents the ac equivalent of resistance. The ac current is altered by resistors and circuit elements such as capacitors and inductors. The magnitude of impedance Z is given by ... 

Other components Resistors, inductors, and capacitors are other passive components used in various circuit as typically shown in Fig. APII/4.13-1. 

Electric circuit schematic of resistor, inductor, and capacitor (RLC) connected in series. 

Analog in-circuit test addresses testing for shorts in the printed wire circuitry analog components, passive devices such as resistors, inductors, and capacitors and simple semiconductor components such as diodes and transistors. Analog in-circuit testing is conducted without applying power to a board that is, it is an unpowered test methodology. 

Other examples are the voltage V in a resistor capacitor RC circuit without an applied input voltage, and the change of current i in a resistor-inductor RL circuit without an applied input current, as described by Equations 3.77 and 3.78 respectively. 

In maldug electrochemical impedance measurements, one vec tor is examined, using the others as the frame of reference. The voltage vector is divided by the current vec tor, as in Ohm s law. Electrochemical impedance measures the impedance of an electrochemical system and then mathematically models the response using simple circuit elements such as resistors, capacitors, and inductors. In some cases, the circuit elements are used to yield information about the kinetics of the corrosion process. 

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