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CAPACITOR PRESENTATION MATERIALS
CAPACITOR PRESENTATION MATERIALS

Transient analysis of resistor-capacitor system
Transient analysis of resistor-capacitor system

... materials, giving rise to interesting electrical properties. The electrical properties at these semiconductor junctions can be characterized using resistors (R) and capacitors (C), giving rise to the name “RC-model”. In this module we will consider the electrical behavior of the simplest configurati ...
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... Since there are two wires from the multimeter, there are two choices of how the wires are connected in a circuit (black wire here, or red wire here?). Exchanging the meter wires changes the relative polarity of the measurement, so the meter display will switch from positive to negative, or vice vers ...
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... 1. What happened to the robot as the resistance increased? Explain the cause of this. Answer: The robot traveled slower because as the resistance increases this decreases the amount of current received by the motors slowing them down. 2. Were you able to place the resistors in the correct order the ...
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... Step 1 – Choose a direction for the current, and label the current, in each branch of the circuit. A branch is a path from one junction to another in a circuit. Figure 18.23 shows the two junctions (points at which more than two current paths come together) as circles, with the three different branc ...
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EE121Lec02 - My FIT (my.fit.edu)

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... αF ≈ 1, and αR = 0.1. Sketch graphs for IE = 0.1 mA, 0.5 mA, and 1 mA. For each, give the values of vBC , vBE , and vCE for which (a) iC = 0.5αF IE and (b) iC = 0. (a) The Ebers-Moll equations are iE = ...
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TRIAC



TRIAC, from triode for alternating current, is a genericized tradename for an electronic component that can conduct current in either direction when it is triggered (turned on), and is formally called a bidirectional triode thyristor or bilateral triode thyristor.TRIACs are a subset of thyristors and are closely related to silicon controlled rectifiers (SCR). However, unlike SCRs, which are unidirectional devices (that is, they can conduct current only in one direction), TRIACs are bidirectional and so allow current in either direction. Another difference from SCRs is that TRIAC current can be enabled by either a positive or negative current applied to its gate electrode, whereas SCRs can be triggered only by positive current into the gate. To create a triggering current, a positive or negative voltage has to be applied to the gate with respect to the MT1 terminal (otherwise known as A1).Once triggered, the device continues to conduct until the current drops below a certain threshold called the holding current.The bidirectionality makes TRIACs very convenient switches for alternating-current (AC) circuits, also allowing them to control very large power flows with milliampere-scale gate currents. In addition, applying a trigger pulse at a controlled phase angle in an AC cycle allows control of the percentage of current that flows through the TRIAC to the load (phase control), which is commonly used, for example, in controlling the speed of low-power induction motors, in dimming lamps, and in controlling AC heating resistors.
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