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Q.

In a single state transistor amplifier, when the signal changes by 0.02 V, the base current change by 10μA and collector current by 1mA. If collector load RC=2kΩ and RL=10kΩ , Calculate Current Gain, Input impedance, Effective a.c.load, Voltage gain and Power gain.

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a

50,2kΩ,1.66kΩ,83,8300

b

100, 1kΩ,1.66kΩ,83,8300

c

100, 2kΩ,1.66kΩ, 83, 830

d

100, 2kΩ,1.66kΩ,83,8300

answer is D.

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Detailed Solution

(i) Current Gain β=δicδib(ii) Input impedance Ri=δVBEδib(iii) Effective (ac) load RAC=RCRLRC+RL(iv) Voltage gain Av=β×RACRin(v) Power gain, Ap=Av×β

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