The densities of electrons and holes in an extrinsic semiconductor are `7.5xx10^(13)cm^(-3)` and `4.5 xx 10^(12)cm^(-3)` respectively. The mibilities of electrons and holes are `23xx10^(3)cm^(2)//V-s` and `10^(2)cm^(2)//V-s` respectively. What is the type of semiconductor? Find the resistivity of this semiconductor.

Explanation

To solve the problem step by step, we will follow these procedures:

### Step 1: Identify the given values
We have the following values:
- Density of electrons, \( n_e = 7.5 \times 10^{13} \, \text{cm}^{-3} \)
- Density of holes, \( n_h = 4.5 \times 10^{12} \, \text{cm}^{-3} \)
- Mobility of electrons, \( \mu_e = 23 \times 10^{3} \, \text{cm}^{2}/\text{V-s} \)
- Mobility of holes, \( \mu_h = 10^{2} \, \text{cm}^{2}/\text{V-s} \)
...