Question

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

Which of the following statements are true?

• A. At $V_{i} = 1V,$ it can be used as an amplifier.
• B. At $V_{i} = 0.5jV,$ it can be used as a switch turned off.
• C. At $V_{i} = 2.5V,$ it can be used as a switch turned on.
• D. All of these

Answer 1

Answer: (D)

All of these

Answer 2

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

(i) When $V_{i} = 1V,$ which is in between $0.6Vto2V$the transistor circuit is in active state and is used as an amplifier

(ii) When, $V_{i} = 0.5V,$ 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 $V_{i} = 2.5V,$ 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.