The collector supply voltage is 6 V and the voltage drop across a resistor of `600 Omega` in the collector circuit is 0.6 V, in a transistor connected in common emitter mode. If the current gain is 20, the base current is

Options

A. 0.25 mA
B. 0.05 mA
C. 0.12 mA
D. 0.02 mA

Answer

B

Explanation

`i_(C)R_(C) = V_(C)`
`i_(C) = (V_(C))/(R_(C)) = (0.6)/(600) = 1 mA`
`therefore beta = (i_(C))/(i_(B))`
or `i_(B) = (i_(C))/(beta) = (1)/(20) = 0.05 mA`