Physics · 2012
NEET 2012 · Prelims · Code A · Q50
Transfer characteristics [output voltage ( V_0) vs input voltage ( V_i ) ] for a base biased transistor in CE configuration is as shown in the…
Transfer characteristics [output voltage $\displaystyle \left(\mathrm{V}_0\right)$ vs input voltage $\displaystyle \left(\mathrm{V}_{\mathrm{i}}\right)$ ] for a base biased transistor in CE configuration is as shown in the figure. For using transistor as a switch, it is used :

Official answer
(4)
both in region (I) and (III)
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