Assertion : In a common emitter transistor amplifier, the input current is much less than output current.
Reason : The common-emitter transistor amplifier has a very high input impedance.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion
B. If both assertion and reason are true but reason is not the correct explanation of assertion
C. If assertion is true but reason is false
D. If both assertion and reason are false

Answer

C

Explanation

A good amplifier stage is one which has high input resistance and low output resistance. A transistor in CB configuration has a very law resistance `(cong 20 Omega)` and a very high output resistance `(cong 1 M Omega).` It is just the reverse of what is required. The CE configuration is better, its input resistance is about `1 kOmega` and output resistance about `10 kOmega`. Although input resistance of CE is not very high but it still prefers better amplifier.