Home
Class 12
PHYSICS
For a CE-transistor amplifier,the aurdio...

For a CE-transistor amplifier,the aurdio signal across the collectoed resistance of 2 `k Omega ` is 2V. Suppose the current amplification factor of the transistoris 100, find the input signal voltage and base current, if the base resistance is `1 k Omega`.

Text Solution

Verified by Experts

Given, collector resistance `R __("output") = 2 K Omega = 2000 Omega `
Current amplification factor of the transistor `beta _(AC) = 100`.
Audio signal voltage `V_("output") = 2V `
Input ( base) resistance `R_("input") = 1 K Omega = 1000 Omega `
`:.` Voltage gain `A_(V ) = ( v_("output"))/(v_("input"))= beta_(ac) . ( R_("output"))/(R_("input"))`
`:.`Input signal voltage `V_("input")= ( V_("output"))/(beta_(ac).((R_("output"))/(R_("input"))))= (2)/( 100((2000)/(1000)))= 0.01V `
Base ( input ) current `I_(B) = ( V_("input"))/( R_("input"))= (0.01 )/(1000) xx 10 xx 10^(-6) =10 mu A `
Promotional Banner

Topper's Solved these Questions

  • SEMICONDUCTOR ELECTRONICS : MATERIALS , DEVICES , AND SIMPLE CIRCUITS

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise ADDITIONAL EXERCISES|8 Videos

  • SEMICONDUCTOR ELECTRONICS : MATERIALS , DEVICES , AND SIMPLE CIRCUITS

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise LONG ANSWER QUESTIONS|7 Videos

  • RAY OPTICAL AND INSTRUMENTS

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise TEXTUAL EXERCISES|60 Videos

  • TELANGANA MARCH-2019

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise SECTION -B|5 Videos

Similar Questions

Explore conceptually related problems

For a transistor amplifier, the collecor load resistance R_(L) = 2k ohm and the input resistance R_(i) = 1k ohm . If the current gain is 50, calculate voltage gain of the amplifier.

In the common-base configuration, a transistor has current amplification factor 0.95. If the transistor is used in common-emitter configuration and base current changes by 2muA , then the change in the collector current is

The intemal resistance of a 2.1 V cell which gives a current of 0.2 A through a resistance of 10Omega is

A common emitter transistor amplifier has a current gain of 50. If the load resistance is 4 kOmega and input resistance is 500 Omega , the voltage gain of the amplifier is