Question

The electron mobility is larger than the hole mobility in :

• A. pnp transistors
• B. npn transistors
• C. both
• D. none of these

Answer 1

The correct option is B npn transistors

There are only two types of bipolar sandwich, which are namely pnp and npn. In semiconductors, the npn’s has characteristically higher electron mobility compared to the hole mobility. Therefore, it permits a large amount of current and operates very fast. And also, the making of this transistor is easy from silicon. In pnp type of transistor, the majority charge carriers are holes.