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The input resistance in a CB transistor is given by _________(a) ∆VCE/∆IB(b) ∆VBE/∆IB(c) ∆VBE/∆IC(d) ∆VEB/∆IEI have been asked this question in a job interview.The query is from The CB Characteristics in portion Transistor Characteristics of Electronic Devices & Circuits

Answer»

Right option is (d) ∆VEB/∆IE

Easy EXPLANATION: The RATIO of change in emitter BASE voltage (∆VEB) to resulting change in emitter current (∆IE) at constant COLLECTOR base voltage (VCB) is defined as input resistance. This is denoted by ri.



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