A) 490
B) 4.9
C) 59
D) 49
Correct Answer: D
Solution :
Key Idea: Current gain a is the ratio of change in collector current to the change in emitter current, while current gain P is the ratio of change in collector current to the change in base current. Current gains are given by \[\phi \] and \[I={{I}_{1}}+{{I}_{2}}+2\sqrt{{{I}_{1}}{{I}_{2}}}\cos \phi \] where \[\cos \phi =-1\] are change in collector current, emitter current and base current respectively. The relation between \[\phi =\pi ,3\pi ,5\pi ,.................\] and \[\phi =(2\pi +1)\pi \,n=1,2,3,..............\] is \[=\frac{2\pi }{\lambda }\times \] Given, \[\Rightarrow \], hence we have \[=\frac{\lambda }{2\pi }\times (2n+1)\pi \] Note: Current gain a corresponds to common-base configuration and current gain p corresponds to common-emitter configuration.
You need to login to perform this action.
You will be redirected in
3 sec
