Resistivity of a semiconductor depends on

Options

A. Shape of semiconductor
B. Atomic nature of semiconductor
C. Length of semiconductor
D. Shape and atomic nature of semiconductor

Explanation

To answer the question "Resistivity of a semiconductor depends on," we can break down the factors that influence the resistivity of semiconductors step by step.

### Step-by-Step Solution:

1. **Definition of Resistivity**:
- Resistivity (ρ) is defined as a measure of how strongly a material opposes the flow of electric current. It is an intrinsic property of the material, meaning it does not depend on the shape or size of the sample.

2. **Intrinsic Properties**:
- The resistivity of a semiconductor is primarily determined by its intrinsic properties, which include the atomic structure and the nature of the material itself.

3. **Temperature Dependence**:
- One of the key factors that affect the resistivity of semiconductors is temperature. As temperature increases, the thermal energy allows more charge carriers (electrons and holes) to be generated, which decreases resistivity.

4. **Doping Concentration**:
- The resistivity of a semiconductor can also be significantly affected by the level of doping. Doping introduces additional charge carriers into the semiconductor, which can either increase or decrease resistivity depending on whether the dopant is an n-type (adding electrons) or p-type (adding holes) material.

5. **Material Composition**:
- Different semiconductor materials (such as silicon, germanium, gallium arsenide) have different intrinsic resistivities due to their unique atomic structures and bonding characteristics.

6. **Electric Field Influence**:
- The application of an external electric field can also influence the resistivity of a semiconductor, as it can affect the mobility of charge carriers within the material.

### Final Answer:
The resistivity of a semiconductor depends on:
- Temperature
- Doping concentration
- Material composition
- Electric field influence