The part of a transistor which is heavily doped to produced large number of majority carries is

Options

A. emitter
B. base
C. collector
D. can be any of the above three

Answer

To solve the question regarding which part of a transistor is heavily doped to produce a large number of majority carriers, we can follow these steps:

### Step 1: Understand the Structure of a Transistor
Transistors can be of two types: NPN and PNP. In an NPN transistor, there are three regions: the emitter (N-type), the base (P-type), and the collector (N-type). In a PNP transistor, the arrangement is similar but with P-type as the emitter and collector, and N-type as the base.

**Hint:** Remember that the transistor consists of three regions: emitter, base, and collector.

### Step 2: Identify the Doping Levels
In a transistor:
- The **emitter** is heavily doped to ensure a large number of majority carriers are available for conduction.
- The **base** is lightly doped to allow for control of the current flow.
- The **collector** is moderately doped.

**Hint:** The emitter is designed to inject carriers into the base, hence it needs to be heavily doped.

### Step 3: Determine the Majority Carriers
In an NPN transistor, the majority carriers in the emitter are electrons (due to heavy doping with donor impurities). In a PNP transistor, the majority carriers in the emitter are holes (due to heavy doping with acceptor impurities).

**Hint:** Focus on the type of transistor to identify the majority carriers in each region.

### Step 4: Conclude the Answer
Since the question asks for the part of the transistor that is heavily doped to produce a large number of majority carriers, the answer is the **emitter**.

**Final Answer:** The part of a transistor which is heavily doped to produce a large number of majority carriers is the **Emitter**.

### Summary of Steps:
1. Understand the structure of a transistor.
2. Identify the doping levels of each region.
3. Determine the majority carriers in each region.
4. Conclude that the emitter is heavily doped to produce majority carriers.