Which region collector current is proportional to base current?
saturation region
Explanation: The collector current is directly proportional to the base current in the saturation region of the BJT.
Is emitter a current?
The common emitter configuration has a current gain approximately equal to the β value of the transistor itself. However in the common collector configuration, the load resistance is connected in series with the emitter terminal so its current is equal to that of the emitter current.
Why is base current so small?
Small is relative term, current gain of the transistor decides how small base current would be than collector current. Most of the emitter current of electrons diffuses through the thin base into the collector. Moreover, modulating the small base current produces a larger change in collector current.
How does a PNP transistor work in a NPN circuit?
If we compare the circuit of PNP transistor with NPN transistor, then here the polarity and direction of current are reversed. If a PNP transistor is connected with voltage sources as shown in the above figure, the base current will flow through the transistor.
How does a change in base current affect collector current once the..?
Yes, the base current causes things to happen in the transistor: a proportional amount of collector current flows. So changes in base current are amplified into larger changes in collector current.
Where is the arrow located in a PNP transistor?
The arrow for BJT transistors is always located on the emitter terminal and also it indicates the direction of conventional current flow. In PNP transistor this arrow indicates as ‘pointing in’ and the current direction in PNP is completely opposite to the NPN transistor.
How does a back to back pn junction diode work?
These back to back PN junction diodes are known as the collector-base junction and base-emitter junction. Regarding the three terminals of the PNP transistor, the Emitter is a region is used to supply charge carriers to the Collector via the Base region. The Collector region collects most of all charge carriers emitted from the Emitter.