In a properly biased transistor

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In a properly biased transistor—

1. Both depletion regions are small
2. Both depletion regions are large
3. The emitter to base depletion regions is large and collector to base depletion region is small
4. The emitter to base depletion region is small and collector to base depletion region is large

Correct Option: D

In a properly biased transistor the emitter to base depletion region is small and collector to base depletion region is large because
* The doping of emitter region is large as compare to collector region since

depletion width ∝	1
	√Doping concentration

* Usually the emitter to base junction is forward biased while collector to base junction is reverse biased.