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Define the terms input resistance and current amplification factor of a transistorin CE mode. |
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Answer» Solution :Input Resistance :- It is defined as the RATIO of CHANGE in base-emitter voltage `(DELTA V_(BE))`to the change in base current `(Delta I_B)`at constant COLLECTOR-emitter voltage `(V_(CE))` i.e., `r_i = ((Delta V_(BE))/(Delta I_B))_(v_(CE))` Current amplification factor :- It is defined as the ratio of change in collector current `(Delta I_C)`to the change in base current (`Delta I_B)`at constant collector-Emitter `(V_(CE))`when the transistor is in active state. i.e., `beta_(ac) = ((Delta I_C)/(Delta I_B))_(v_(CE))` |
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