First slide

Transistor

Question

In the common emitter circuit shown in figure, if $V_{B E} = 2 v o l t, V_{C E} = 5 v, β = 100,$ Then base current $I_{B} i s$

Moderate

A

0.2 mA
B

0.1 mA
C

1 mA
D

0.5 mA

Solution

(2)
$\begin{array}{l} H e r e, 20 - 1.5 \times 10^{3} \times I_{C} - 5 = 0 \\ \Rightarrow I_{C} = 0.01 A \\ N o w, \frac{I_{C}}{I_{B}} = β \Rightarrow I_{B} = \frac{I_{C}}{β} = \frac{0.01}{100} A = 0.1 m A \end{array}$

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