दिए गए परिपथ आरेख में निवेशी वोल्टता `(V_1 ) 20V, V_(BE) = 0` तथा VE = 0 है| `V_(CE) =0` है `I_B ,I_C ` तथा` beta ` के मान होंगे

Options

A. `I_B = 40 1 mu A ,I_C = 10 mA ,beta -250`
B. `I_B= 25 mu A ,I_C = 5 mA , beta = 200`
C. `I_B = 20 mu A ,I_C = 5 mA , beta = 250 `
D. `I_B = 40 muA ,I_C = 5 m A , beta =125`

Answer

D

Explanation

` V_i =I_B R_B +V_(BE)`
` 20 = I_B = (20 )/( 500 xx 10^3) +0 `
` I_B =(20)/(500 xx 10^3)= 40 mu A `
`V_(C C) = I_C R_C +V_(C E) `
`20 =I_C xx (4 xx 10^3) +0`
` I_C = 5xx 10^(-3) = 5 mA `
` beta = (I_C )/(I_B ) = ( 5 xx 10^(-3))/(40 xx 10^(-6)) =125`