Transistors on schematics are labeled Q followed by a reference number because of tradition. The letter could be something else, for example I have some old schematics that use T, however T is traditionally used for Transformers.
Some other traditional schematic component labels are:
Q point which is quiscent (silent) point is the operating point of a transistor where the variations of collector current and collector-emitter voltage take place when signal is applied.
Q point is also called operating point.Q point is mainly adjusted in transistors to make it stable. i.e., to operate the transistor in safe mode. Depending up on the operating current and voltage Q point is adjusted. The Q point defines the operating condition of the transistor and the transistors which quiescent point is adjusted are denoted as Q1,Q2.........Qn
transistor has 2 output 1 and 0 so can be used as a switch
Its a Transistor used in JFET (Junction Field Effect Transistor)
why we use base resistor in emitter bias
There is no specific symbol. The symbol for real numbers is R and that for rational numbers is Q so you could use R \ Q.
The operating point of a transistor is called the Q point because Q stands for "quiescent," which means a state of rest or inactivity. It represents the DC bias conditions at which the transistor operates when there is no input signal. This point is crucial for analyzing the transistor's behavior and ensuring proper amplification.
Q is the set of all rational numbers. The letter Q is used because rationals can be expressed as a quotient of two integers. Any letter from the Greek or Latin alphabet may be used as a symbol for an individual rational number.
Seems Q was used because it refers the to "Quantity" of electrical charge.
Q point which is quiscent (silent) point is the operating point of a transistor where the variations of collector current and collector-emitter voltage take place when signal is applied.
See link below...
A: A transistor has non linear gain. To find the gain a Q point must be specified
we do bias field effect transistor because FET works if its Q point lies into active reason .If we bias FET ,the Q point lies in active reason
A "p" is used for probability of success. A "q" is used for probability of failure.
to establish Q- point or operating point...
Because that is the accepted convention. The triangle is the symbol for an amplifier, be it a differential amplifier with two inputs, such as an op-amp, or be it single ended, such as a simple transistor. The triangle symbol is used to show a block diagram of something that might have multiple things inside it, which the op-amp does. It is not generally used to represent a simple transistor, unless you were showing a block diagram. The triangle symbol is also used in digital logic diagrams, to indicate buffers (again, amplifiers), or inverters.
The operating point of a device, also known as bias point or quiescent point (or simply Q-point), is the DC voltage and/or current which, when applied to a device, causes it to operate in a certain desired fashion. The term is normally used in connection with devices such as transistors and diodes which are used in amplification or rectification.