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For a bipolar junction transistor (BJT) to operate in the active amplification mode, the base-emitter junction must be forward-biased while the base-collector junction is reverse-biased.

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True. Operating a bipolar junction transistor in the active amplification region requires a forward-biased base-emitter junction and a reverse-biased base-collector junction.
The statement is correct because linear amplification in a bipolar junction transistor strictly requires the input base-emitter diode junction to be forward-biased to initiate current flow, and the output collector-base junction to be reverse-biased to sweep and gather charge carriers into the collector circuit.

Adım Adım Çözüm

1
Identify the specified operating state of the transistor
The transistor is designated to operate in active (linear) amplification mode.
A transistor exhibits distinct junction biasing configurations depending on whether it functions in cutoff, saturation, or active mode.
2
Determine the required bias across the base-emitter junction
The base-emitter junction must be forward-biased.
Forward-biasing this junction overcomes the internal barrier potential (approximately 0.7 V for silicon) and injects carriers into the base.
3
Determine the required bias across the base-collector junction
The base-collector junction must be reverse-biased.
Reverse-biasing this junction establishes a wide depletion region with an electric field that sweeps the injected carriers into the collector.
4
Evaluate the accuracy of the statement
The statement correctly describes both required junction conditions.
The combination of a forward-biased base-emitter junction and a reverse-biased base-collector junction precisely defines active region operation.

Anahtar Kavram

Bipolar Junction Transistor Biasing and Operating Modes
Tahmini Süre:45s
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