question_answer

For a transistor, in a common emitter arrangement, the alternating current gain b is given by      [DPMT 2004]

A)            \[\beta ={{\left( \frac{\Delta {{I}_{C}}}{\Delta {{I}_{B}}} \right)}_{{{V}_{C}}}}\]        

B)            \[\beta ={{\left( \frac{\Delta {{I}_{B}}}{\Delta {{I}_{C}}} \right)}_{{{V}_{C}}}}\]

C)            \[\beta ={{\left( \frac{\Delta {{I}_{C}}}{\Delta {{I}_{E}}} \right)}_{{{V}_{C}}}}\]        

D)            \[\beta ={{\left( \frac{\Delta {{I}_{E}}}{\Delta {{I}_{C}}} \right)}_{{{V}_{C}}}}\]