Question

When the transistor is used as an amplifier,

• A. Emitter-base junction must be reverse biased, Collector-base junction must be forward biased.
• B. Emitter-base junction must be forward biased, Collector-base junction must be forward biased.
• C. Emitter-base junction must be reverse biased, Collector-base junction must be reverse biased.
• D. Emitter-base junction must be forward biased, Collector-base junction must be reverse biased.

Answer 1

The correct option is A Emitter-base junction must be reverse biased,

Collector-base junction must be forward biased.

Application	Region of operation	Collector-emitter junction	Base-emitter junction
Amplifier	Active	Forward-biased	Reverse-biased
Switch (on)	Saturation	Forward-biased	Forward-biased
Switch (off)	Cutoff	Reverse-biased	Reverse-biased