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PHY104 Lab 7: Kirchoff`s Rules
PHY104 Lab 7: Kirchoff`s Rules

... more of the resistors, again using Ohm’s law. In figure 2, since all the resistors are the same, the voltage drop is the same across each resistor, 3.33 volts in this case. Note that the sum of all the voltage drops adds up to the voltage of the battery. As is shown below in figure 3, the voltage dr ...
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Current and voltage in electrical circuits

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... The output voltage will be flat at 6.0 V, when the ripple voltage is above 6.0 V, when the ripple voltage drops below 6.0 V, the output voltage will drop. 6. C A larger capacitor gives a longer time constant and a smaller ripple voltage. All the other changes will do the opposite. 7. C Time constant ...
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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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