In an experiment of $CE$ configuration of $n-p-n$ transistor,the transfer characteristics are observed as given in the figure. If the input resistance is $200 \ \Omega$ and output resistance is $60 \ \Omega$,the voltage gain in this experiment will be:

For a transistor to act as a switch,it must be operated in

For a transistor,in a common emitter arrangement,the alternating current gain $\beta$ is given by

Given below are two statements:
Statement $I:$ In a typical transistor,all three regions emitter,base and collector have same doping level.
Statement $II:$ In a transistor,collector is the thickest and base is the thinnest segment.
In the light of the above statements,choose the most appropriate answer from the options given below.

Three circuit connections of a $PNP$ transistor are given below. Which of the following represents the Common-Emitter configuration?