The ability of a semiconductor to conduct electricity can be enhanced by adding small amount of certain impurities to the semiconducting element .The process of adding small quantities of these other elements to a semiconducting element to increase it conductivity is called

Options

A. doping
B. tapping
C. hiding
D. tampering

Explanation

To solve the question regarding the process of enhancing the conductivity of a semiconductor by adding impurities, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Semiconductors**:
- Semiconductors, such as silicon, have a limited ability to conduct electricity in their pure form. Their conductivity can be significantly improved by introducing impurities.

2. **Identifying the Process**:
- The process of adding small amounts of certain impurities to a semiconductor to enhance its conductivity is a well-known technique in semiconductor physics.

3. **Types of Impurities**:
- There are two main types of impurities that can be added:
- **Pentavalent impurities** (e.g., phosphorus) which have five valence electrons. When added to silicon, they provide an extra electron that can move freely, enhancing conductivity.
- **Trivalent impurities** (e.g., aluminum) which have three valence electrons. When added, they create "holes" (absence of an electron), which can also contribute to conductivity.

4. **Conclusion**:
- The correct term for the process of adding these impurities to increase conductivity is **doping**.

### Final Answer:
The process of adding small quantities of impurities to a semiconducting element to increase its conductivity is called **doping**.