Question

In $n$-type semiconductor, electrons are majority charge caries but it does not show any negative charge. The reason is

• A. electrons are stationary
• B. electrons neutralize with holes
• C. mobility of electrons is extremely small
• D. atom is electrically neutral

Answer 1

Answer: (D)

The $n$ -type semiconductor region has (negative) electrons as majority charge-carriers and an equal number of fixed positively-charged donor ions. Again, the material as a whole is neutral. That is a reason atom is electrically neutral.