Can two p-junction diodes placed back to back act as a p-n-p transistor ? If not, why ?

Explanation

To determine whether two p-n junction diodes placed back to back can act as a p-n-p transistor, we need to analyze the structure and functioning of both diodes and transistors.

### Step-by-Step Solution:

1. **Understanding the Structure of a p-n-p Transistor:**
- A p-n-p transistor consists of three regions: the emitter (p-type), the base (n-type), and the collector (p-type).
- The emitter is heavily doped to inject holes (majority carriers) into the base, which is lightly doped. The collector is also p-type but less doped compared to the emitter.

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