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The frequency of oscillation of current ...

The frequency of oscillation of current in the indcutor is

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(i) `r_(i)=(Delta V_(BE))/(Delta I_(B) )=(0.02)/(20xx10^(-6)) = 1k Omega`, `beta_(ac)=(Delta I_(C))/(Delta I_(B) )= (2xx10^(-3))/(20xx10^(-6))=100` (ii) Voltage gain, `A_(v) =-g_(m)R_(L)=-(0.1)(5xx10^(3))=-500`.(since, `g_(m)=(beta _(ac))/(r_(i)))`
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