A p-type semiconductor is

Options

A. positive charged
B. negetively charged
C. uncharged
D. uncharged at 0K byt charged at higher temperatures.

Answer

To solve the question regarding the nature of a p-type semiconductor, let's break it down step by step:

### Step 1: Understanding the Definition of a p-type Semiconductor
A p-type semiconductor is formed when a trivalent impurity (such as boron) is added to a pure semiconductor (like silicon). This process creates "holes" in the semiconductor's crystal lattice.

**Hint:** Remember that p-type refers to the presence of holes, which are the absence of electrons.

### Step 2: Analyzing the Charge Carriers
In a p-type semiconductor, the added trivalent atoms create holes because they have one less electron than the semiconductor atoms they replace. Each hole can be thought of as a positive charge carrier.

**Hint:** Consider what happens to the electron count when trivalent atoms are introduced.

### Step 3: Impurity Atoms and Their Charge
The impurity atoms (e.g., boron) are deficient in one electron, which means they effectively create a positive charge (due to the absence of an electron). However, these impurity atoms themselves do not carry a net charge; they are neutral in the lattice.

**Hint:** Focus on the relationship between the holes created and the charge of the impurity atoms.

### Step 4: Overall Charge of the p-type Semiconductor
While there are many holes (positive charge carriers) in a p-type semiconductor, the number of negatively charged impurity atoms (due to their deficiency of electrons) is equal to the number of holes. Therefore, the overall charge of the p-type semiconductor remains neutral.

**Hint:** Think about how the positive and negative charges balance each other out.

### Step 5: Conclusion
Based on the analysis, the correct answer to the question "A p-type semiconductor is" is that it is electrically uncharged overall. Thus, the correct option is "uncharged."

**Final Answer:** A p-type semiconductor is uncharged.