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Chapter 19: Problem 2657

For normal operation of the transistor, the collector diode has to be (A) Forward biased (B) Reverse biased (C) Non conducting (D) Operating in breakdown region

Short Answer

Expert verified
For normal operation of a transistor, the collector diode should be reverse biased (Option B). This allows the transistor to operate in the active mode, providing the desired amplification.

Step by step solution

01

Option A: Forward biased

Forward biasing the collector diode would mean the collector-base junction is forward biased. This would result in both the emitter-base and collector-base junctions being forward biased. In this case, the transistor would be operating in saturation mode. While this is possible, it's not the most common mode of operation, since it does not provide proper amplification.
02

Option B: Reverse biased

Reverse biasing the collector diode means the collector-base junction is reverse biased. In this case, the transistor will be operating in the active mode, where it provides the desired amplification. This is the normal operation mode of a transistor.
03

Option C: Non-conducting

If the collector diode is non-conducting, that would essentially mean the transistor is in the cut-off region (no current flow between the collector and emitter). This is not the normal operation of a transistor, as it does not provide any amplification.
04

Option D: Operating in breakdown region

The breakdown region is not a normal operating mode for a transistor. Operating in the breakdown region can potentially damage the transistor due to excessive current flow. Based on the analysis, the correct answer is: (B) Reverse biased

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