For a CE- transistor amplifier , the audio signal voltage across the collector resistance of ` 2 k Omega ` is 2 V . Suppose the current amplifiaction factor of the transistor is 100 . Find the input signal voltage and base current , if the base resistance is `1 k Omega` .
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Here, `R_(0)=2xx10^(3)Omega, V_(0)=2V`, `beta_(ac)=100,R_(i)=10^(3)Omega` Voltage gain, `A_(v)=V_(0)/V_(i)=beta_(ac)xxR_(0)/R_(i)` `=100xx(2xx10^(3))/10^(3)=200` or `V_(i)=V_(0)/200=2/200=0.01V` Base current, `I_b=V_(i)/R_(i)=0.01/10^(3)=10^(-5)A`
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