Question

The common collector transistor configuration has the following property:

• A. High input and low output resistances
• B. High input and high output resistances
• C. Low input and low output resistances
• D. Low input and high output resistances

Hint:

Common collector → high input, low output resistance → used for impedance matching.

Answer 1

The Correct Option is A

The common collector transistor configuration, also known as the emitter follower, is a fundamental circuit in electronics. It is characterized by its ability to efficiently buffer signals—that is, to provide high input impedance and low output impedance. This makes it ideal for impedance matching applications, where it acts as a middleman adapting any high-resistance sources to drive lower-resistance loads efficiently. Therefore, the correct description for a common collector configuration is that it has high input resistance and low output resistance.

In summary, for the common collector configuration:

• Input Resistance: High
• Output Resistance: Low

The correct answer to the given question is: High input and low output resistances.