First slide

Transistor

Question

In a n-p-n transistor in common base configuration, keeping the base current unchanged if the collector-emitter voltage changes by 0.2 volt, it is observed that the collector current changes by 0.1 mA. Then output resistance of the transistor is

Moderate

A

$5 K Ω$
B

$1 K Ω$
C

$0.5 K Ω$
D

$2 K Ω$

Solution

$R_{0} = \frac{Δ V_{C E}}{Δ I_{C}}$ at constant $I_{B}$
$= \frac{0.2}{0.1 \times 10^{- 3}} Ω = 2 K Ω$

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