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Question: The transfer characteristics of a base biased common emitter transistor is shown in the figure. Whi...

The transfer characteristics of a base biased common emitter transistor is shown in the figure.

Which of the following statements are true?

A

At Vi=1V,V_{i} = 1V, it can be used as an amplifier.

B

At Vi=0.5jV,V_{i} = 0.5jV, it can be used as a switch turned off.

C

At Vi=2.5V,V_{i} = 2.5V, it can be used as a switch turned on.

D

All of these

Answer

All of these

Explanation

Solution

: From the given transfer characteristics of a base biased common emitter transistor.

(i) When Vi=1V,V_{i} = 1V, which is in between 0.6Vto2V0.6Vto2Vthe transistor circuit is in active state and is used as an amplifier

(ii) When, Vi=0.5V,V_{i} = 0.5V, there is no collector current. The transistor is in cut off state. The transistor circuit can be used as a switch turned off.

(iii) When Vi=2.5V,V_{i} = 2.5V, the collector current becomes maximum and transistor is in saturation state and can be used as switch turned on state, so option (1) (2) and (3) are correct.