Common emitter amplifier

Draw the circuit diagram of a common emitter amplifier using n-p-n transistor. What is the phase difference between the input signal and output voltage? State two reasons why a common emitter amplifier is preferred to a common base amplifier.

The input resistance of a common emitter amplifier is 330Omega and the load resistance is 5 kOmega A change of base current is 15 muA results in the change of collector current I mA. The voltage gain of the amplifier is

A transistor has a current amplification factor (current gain) of 50. In a common emitter amplifier circuit, the collector resistance is chosen as 5Omega and the input resistance is 1Omega . The output voltage if input voltage is 0.01 V is

(a) For given transistor circuit, the base current is 10muA and the collector current is 5.2 mA. Can this transistor circuit be used as an amplifier. Your answer must be supported with proper explanation. (b). For a common emitter amplifier, current gain is 69. if the emitter current is 7 mA then calculate the base current and collector current.

An npn transistor operates as a common emitter amplifier with a power gain of 10^6 . The input circuit resistance is 100 Omega and the output load resistance is 10 k Omega . The common emitter current gain ' beta ' will be (Round off to the Nearest Integer)

When a positive voltage signal is applied to the base of a common emitter npn amplifier

For a transistor working as common base amplifier, the emitter current is 0.72 mA. The. Current gain is 0.96. The collector current is

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.

If a transistor is used in common -emitter mode as an amplifier,then