Question

Silicon doped with electron-rich impurity forms ________.

• A. $p-type$ semiconductor
• B. $n-type$ semiconductor
• C. intrinsic semiconductor
• D. insulator

Answer 1

The correct option is B $n-type$ semiconductor

An N-Type semiconductor is created by adding pentavalent impurities like phosphorus ($P$), arsenic ($As$), antimony ($Sb$), or bismuth ($Bi$). A pentavalent impurity is called a donor because it is ready to give a free electron to a semiconductor. A pentavalent impurity is electron rich impurity.

So, the correct answer is option $B$.