Question

Grounded base amplifier is another name for
A. Common base amplifier
B. Common emitter amplifier
C. Common collector amplifier
D. None of these

Answer 1

The above problem is based on the working principle of the amplifier. The amplifier is the form of a transistor which is used to amplify the input signal. The amplification of the amplifier is the same as the ratio of the output signal to input signal. The amplifier may be used to control the voltage, current or voltage and current. The amplifier that controls the current in the circuit is called the current amplifier and that used for voltage control is called the voltage amplifier.

Complete step by step answer:
The transistor is a three terminal device. The three terminals of the transistor are base, emitter and collector. The transistor may be of type NPN or PNP. The transistor can be used as an amplifier by using three forms of the connections. First form of connection is common base, second is common emitter and third is common collector.

The input signal in the common base is applied across the base and emitter. The output signal is obtained across the emitter and collector.

The input signal in the common emitter is applied across the base and emitter. The output signal is obtained across the emitter and collector.

The input signal in the common collector is applied across the base and emitter. The output signal is obtained across the base and collector.

The grounded base amplifier is the form of transistor in which base is connected to the ground and base is common for both emitter and collector.

Thus, the Grounded base amplifier is another name for a common base amplifier and the option (A) is the correct answer.

Note: Always remember the connection for the input and output of the signal because mistakes in connecting terminals can form different configurations of transistors.