1.

दिये गए परिपथ आरेख में, निवेश वोल्टता `(V _(i )) 20 V , V _(BE ) =0 ` तथा `V _(CE ) = 0 ` है। `I _(B ), I _(C ) ` तथा `beta ` के मान होंगे : A. `I_(B)=40muA, I_(C)=10mA, beta=250`B. `I_(B)=40muA, I_(C)=5mA, beta=125`C. `I_(B)=20muA, I_(C)=5mA, beta=250`D. `I_(B)=25muA, I_(C)=5mA, beta=200`

Answer» Correct Answer - B
`V_(i)=i_(B)R_(B)+V_(BE)`
`20=i_(B)xx(500xx10^(3))=0`
`i_(B)=(20)/(500xx10^(3))=40 mu A`
`V_(C C)=i_(C)R_(C)+V_(CE)`
`20=i_(C)xx(4xx10^(3))+0`
`i_(C)=(20)/(4xx10^(3))=5mA`
`beta =(i_(C))/(i_(B))=(5xx10^(-3))/(40xx10^(-6))=125.`


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