For a transistor in $CE$ mode to be used as an amplifier,it must be operated in:

For a common emitter transistor,if $\frac{I_{C}}{I_{E}}=0.95$,then the current gain is

The part of a transistor which is heavily doped to produce a large number of majority carriers is

In an experiment,the input characteristics are shown for a $CE$ configuration $n-p-n$ transistor for different output voltages. Based on the graph,which of the following is correct?

In a transistor circuit,the emitter-base circuit of a $n-p-n$ transistor is always

In a transistor circuit, if emitter and collector connections are interchanged, then: