Question

Transfer characteristics [output voltage $\left(V_0\right)$ vs input voltage $\left(V_i\right)$ ] for a base biased transistor in CE configuration is as shown in the figure. For using transistor as a switch, it is used

• A. in region III
• B. both in region (I) and (III)
• C. in region II
• D. in region I

Answer 1

Answer: (B)

In the given graph,
Region (I) - Cutoff region
Region (II) - Active region
Region (III) - Saturation region
Using transistor as a switch it is used in cutoff region or saturation region.
Using transistor as a amplifier it is used in active region.