Question

N-P-N transistor is arranged as in the following figure. This circuit is of

• A. common-base amplifier
• B. common-emitter amplifier
• C. common-collector amplifier
• D. none of these

Hint:

In a common-emitter amplifier, the input is applied to the base, and the output is taken from the collector.

Answer 1

The Correct Option is B

Step 1: Identifying the Transistor Configuration.
In a common-emitter amplifier configuration, the input signal \( V_i \) is applied to the base of the N-P-N transistor, while the output voltage \( V_o \) is taken from the collector. The emitter is typically connected to the ground.

Step 2: Analyzing the Circuit.
From the given diagram, the input voltage \( V_i \) is applied to the base of the N-P-N transistor, and the output voltage \( V_o \) is taken from the collector, which matches the setup for a common-emitter amplifier.

Step 3: Conclusion.
Therefore, the configuration shown in the figure corresponds to a common-emitter amplifier, making option (B) the correct answer.