Is emitter-base junction forward biased in NPN transistor?
Working of NPN Transistor As shown in the above figure, the emitter to base junction is forward biased and the collector to base junction is reverse biased. Forward bias on the emitter to base junction causes the electrons to flow from N type emitter towards the bias.
Why is the emitter-base junction forward biased?
The emitter is always forward biased to enable the majority carriers to cross the emitter-base junction, so that current flows through the transistor.
What does it mean when we say that an NPN transistor is forward biased?
The expression “forward biased” mean applying 0.7 volt on that diode. If you would apply less than 0.7 volt or even negative voltage (for NPN), the transistor would do nothing. The expression “reverse biased” is confusing because it just mean no current at all which for me don’t deserve the “biasing” noun.
On which transistor the base-emitter junction is forward biased?
In the active mode of transistor operation, the base-emitter junction is forward biased and the base-collector junction is reverse biased.
When the emitter junction is forward biased while the collector junction is reverse biased?
The transistor operates in the Active region when the emitter junction is forward biased and the collector is reverse biased in the NPN transistor. For any amplification, (voltage or current), the transistor should be operated in the active region.
When base emitter junction is forward biased & base collector junction is reversed biased then?
The voltage across the emitter diode must be greater than the breakdown voltage so the diode becomes forward bias and the voltage across the collector diode must be less than the breakdown voltage so that diode becomes reverse bias.
In which case does the base emitter junction get forward biased more easily and why?
In a NPN transistor, the Base-Emitter junction is forward biased so that carriers (Electrons) flow from the Emitter to the Base. If a Voltage more positive than the base is put on the collector, any electrons that get into the base will more than likely keep going and end up in the collector.
When base-emitter junction is forward biased & base collector junction is reversed biased then?
When the emitter junction is forward biased while the collector junction is reverse biased the transistor is at?
How do you tell if a transistor is forward biased?
For a transistor to function, the two PN junctions must be properly biased. The base-emitter junction behaves like any other PN junction when viewed alone. If the base-emitter junction is forward biased, the transistor is on. If it is reverse biased, the transistor is off.
Why emitter base junction is forward biased and collector base junction is reverse biased?
As the emitter-base is forward biased the input resistance i.e the resistance of the emitter -base junction becomes very small. Again as the collector base junction is reverse biased the output resistance i.e the resistance of the emitter -collector becomes very high.