The intrinsic semi conductor behaves as insulator at

Options

A. `0^@`
B. `-100^@ C`
C. `100 K`
D. `0 K`

Answer

To solve the question "The intrinsic semiconductor behaves as an insulator at", we can follow these steps:

### Step 1: Understand the Structure of Semiconductors
- Semiconductors have a band structure consisting of a valence band and a conduction band. The valence band is filled with electrons, while the conduction band is typically empty at low temperatures.

**Hint:** Recall that the energy levels in a semiconductor are divided into two main bands: the valence band and the conduction band.

### Step 2: Identify the Energy Gap
- The energy gap (band gap) between the valence band and the conduction band in semiconductors is relatively small compared to insulators. This small gap allows electrons to jump from the valence band to the conduction band when energy is supplied.

**Hint:** Consider how the size of the energy gap affects the ability of electrons to move to the conduction band.

### Step 3: Analyze the Effect of Temperature
- At absolute zero (0 Kelvin), there is no thermal energy available to excite the electrons from the valence band to the conduction band. As a result, all the electrons remain in the valence band, and the conduction band remains empty.

**Hint:** Think about what happens to the thermal energy of electrons at very low temperatures.

### Step 4: Conclude the Behavior of Intrinsic Semiconductors
- Since there are no electrons in the conduction band at absolute zero, intrinsic semiconductors do not conduct electricity and behave like insulators.

**Hint:** Reflect on the relationship between temperature and electrical conductivity in materials.

### Final Answer
- Therefore, the intrinsic semiconductor behaves as an insulator at **absolute zero (0 Kelvin)**.

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