tO BEGIN WITH THE SMALL LEAD IS THE GATE, THEB LOOK AT THE DIODE SEE IF THERE IS A SYMBOL
They are the negative and positive terminals. Higher potential andl ower potential terminals
The terminals on a solid state relay are typically called input terminals and output terminals. The input terminals are used to connect the control signal that activates the relay, while the output terminals are used to connect the load that is being switched on or off by the relay.
A two-way lighting switch typically has 4 terminals: two terminals for the switched circuit and two terminals for the incoming power supply.
To wire a drum switch, you need to identify the terminals on the switch and connect the power source to the appropriate terminals. You also need to connect the load (motor or other device) to the appropriate terminals on the switch. It's important to follow the wiring diagram provided with the drum switch to ensure proper connection and operation. If you are uncertain, seeking the help of a professional electrician is recommended.
The line supply connects to the top terminals of the switch and the load connects to the bottom terminals of the switch.
Three.
See for example http://www.datasheets360.com/pdf/7308997814572458562 In general, terminals are identified by number and name, with reference to the physical appearance of the transistor package.
UJT (UniJunction Transistor): It is a transistor with only one junction and three terminals: an emitter (E) and two bases (B1 and B2). BJT (Bipolar Junction Transistor): This type of transistor consists of two junctions and three terminals, namely Emitter "E", Base "B" and Collector"C". There are two types of BJT, i) PNP and ii) NPN.
Identifying BJTs and FETs on the circuitIt is in fact possible to identify transistors in circuits. However, this depends on one's familiarity with the different types of BJT and FET constructions. Since the transistor is a three-terminal device, it is easy to differentiate it from other circuit elements such as resistors, capacitors and inductorswhich are all two-terminal devices. The only exceptions to this may include regulators; which though are not transistors are provided with three terminals.
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mosfets come in 2 shape 1.round shaped(like bjt):hold it such that the pins face upwards and the knoch perpendicular to your eyes,then name pins as G,D,S in anticlock wise direction. 2.almost squre shaped.hold it perpendicular to your face ,then name them G,D,S from left to right
Disadvantage:Easy to damage when compared to BJT
To identify and connect the terminals of a 3-way switch in a circuit, you need to locate the common terminal, which is usually darker in color or labeled as "COM." The other two terminals are the traveler terminals. Connect the common terminal to the power source or light fixture, and then connect the traveler terminals to the other 3-way switch in the circuit. This setup allows you to control the light or device from two different locations.
To identify and connect the terminals of a three-way switch in a circuit, you need to locate the common terminal, which is usually darker in color or labeled as "COM." The other two terminals are called "traveler" terminals. Connect the incoming power supply to the common terminal and the outgoing power to the other two traveler terminals. Make sure to follow the wiring diagram for the specific switch to ensure proper connection.
Bipolar junction transistor(BJT)
The positive terminals in voltmeters and ammeters are generally indicated by a red coloring and a + (plus) symbol. Negative is generally black and - (minus).
You can see it on the connection on the inside of the package.