97. Which of the following is true? (a) Common base transistor is commonly used because current gain is maximum (b) Common emitter is commonly used because current gain is maximum (c) Common collector is commonly used because current gain is maximum (d) Common emitter is the least used transistor

Question

Which of the following is true? 

(a) Common base transistor is commonly used because current gain is maximum 

(b) Common emitter is commonly used because current gain is maximum 

(c) Common collector is commonly used because current gain is maximum 

(d) Common emitter is the least used transistor

Answer 1

Answer: (B)

The power gain is highest in Common emitter: This transistor configuration is probably the most widely used. The circuit provides a medium input and output impedance levels. Both current and voltage gain can be described as medium, but the output is the inverse of the input, i.e. 180° phase change.