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A transistor is used in common - emitter...

A transistor is used in common - emitter mode on an amplifier circuit . When a signal of 20 mV is added to the base - emitter voltage , the base current changes by ` 20 mu A ` and the collector current changes by 2 m . The load resistance is ` 5 k Omega ` calculate (a) the factor `beta` (b) the input resistance ` R_"in"` (c ) the transconuctctance and (d ) the voltage agin .

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