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because amplifiers are speakers
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When an NPN transistor is properly biased then most of the electrons from the emitter -?
Emitter
How work amplifier?
amplifier consists of active components like transistor fet etc,. for example transistor, it produces high output is common emitter configuration. when u give weak signal to the base of the transistor and the output is taken in collector terminal(amplitude of the weak is increased, so the output is high ) its known as amplifier
When an NPN transistor is properly biased then most of the electrons from the emitter?
collector
Why the single stage common emitter transistor amplifier is famous and widely used in most of the application?
because of low cost and gain is high well amplified
Which terminal represents the control input of a bipolar transistor?
baseUmm....Device current results from forward biasing of the emitter-base junction.Thus you can:1. hold the emitter constant and apply control to the base (most common), or2. hold the base constant and apply control to the emitter (common/grounded base circuit, mostly used at high/very high frequencies).
What does an resistor do?
Most of the time emitter resistors are used to set the bias point of the transistor. Occasionally emitter resistors may act as fast blow fuses to protect a power transistor. In series linear voltage regulators an emitter resistor on each pass transistor to the regulated node is there to equalize current sharing between the pass transistors. In other words it depends on the circuit design.
How do you identify a pnp or npn transistor?
If you know the base of the transistor, and you have an ohmmeter that puts out more than about 0.7 volts, you can check base to emitter or base to collector as if it were a diode, and it will conduct when the more positive lead of the ohmmeter is connected to the P junction. That will tell you if the transistor is NPN or PNP. If you don't know the base, you can check all six directions. Only two should conduct, the two that are forward biased towards the base.
What does an emitter resistor do?
The emitter of a bipolar transistor (junction or point contact type) emits charge carriers(electrons in an NPN, holes in a PNP) through the base towards the collector.
Do Transistor have a polarity?
Transistors have many characteristics and they most certainly require voltages to be a certain polarity if they are to work properly. There are two main types of transistor: PNP and NPN. They are identical except that all polarities are reversed on one compared to the other. There are many books and online resources that describe transistors but here is a very brief note about transistor operation. Each transistor has a base, a collector and an emitter. When a small current is passed from the base to the emitter, a larger current will pass from the collector the the emitter. With an NPN transistor, the base needs to be positive with respect to the emitter and the collector also has to be positive with respect to the emitter for the transistor to work. A PNP transistor is reversed, where both the base and the collector need to be negative with respect to the emitter to operate. Therefore, transistors do indeed have a polarity, even if it is more complex that some other devices. Disclaimer: The above description of transistor operation is greatly simplified and there are operational modes that are outside the conditions described. Please don't use the above description as a definitive guide to transistor behaviour.
What is the most probable junction in transistor maintenance circuits and is it base or base and collector or emitter and collector?
Most probable junction in transister is base emiter
The definition of the term 'characteristics of a transistor'?
It can be used in 3 configurations, common emmiter, common base, common collector, in which common emitter is most widely used configuration.Its a 3 terminal device.It can be use as an amplifiersIt is use in all digital logic familiesHigh input impedence; low output impedence
What is multi emitter transistor?
A bipolar junction transistor with 2 or more emitters. The most common use of these was in the input section of transistor transistor logic (TTL) gates. They offered significantly higher speed and used less area on the IC chip than the diodes used in the input section of the diode transistor logic (DTL) gates that came earlier. This made TTL ICs both faster and cheaper than the DTL ICs which soon became obsolete.
