A transistor is used in common-emitter mode in an amplifier circuit. When a signal 20mV is added to the base-emmiter voltage,the base current changes by `20(mu)A `and the collector current changes by 2mA.The load resistance is `5k(Omega)`.Calculate (a)the factor`(beta)`(b)the input resistance `R_(BE),`(c) the transconductance and (d) the voltage gain .A. `200`B. `300`C. `400`D. `500`

A transistor is used in common-emitter mode in an amplifier circuit. W

1.	A transistor is used in common-emitter mode in an amplifier circuit. When a signal 20mV is added to the base-emmiter voltage,the base current changes by `20(mu)A `and the collector current changes by 2mA.The load resistance is `5k(Omega)`.Calculate (a)the factor`(beta)`(b)the input resistance `R_(BE),`(c) the transconductance and (d) the voltage gain .A. `200`B. `300`C. `400`D. `500`
Answer» Correct Answer - D Voltage gain `=(Output Vol tag e)/(Input vol tag e)` `=(2mAxx5 k Omega)/(20 mV)=(1xx5xx10^(3))/10=500`

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