First slide

Transistor

Question

In the common emitter configuration shown in figure on npn transistor with current gain $β = 100$ is used. The output voltage of the amplifier will be

Difficult

A

10 V
B

0.1 V
C

1 V
D

100 V

Solution

$\begin{array}{l} ΔV = voltage gain = β . \frac{R_{c}}{R_{r}} = 100 \times \frac{100}{1} = 10^{4} \\ V_{Output} = V_{input} \times ΔV = 10^{- 3} \times 10^{4} volt = 10 volt \end{array}$

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