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Question

Physics Question on Resistance

In an experiment of CE configuration of npn transistor, the transfer characteristics are observed as given in figure.

In an experiment of CE configuration of n–p–n transistor

If the input resistance is 200 Ω and output resistance is 60 Ω, the voltage gain in this experiment will be______.

Answer

Voltage gain

=LcRoLBRi=\frac{LcRo}{L_BR_i}

=(10mA)(60Ω)(200μA)(200Ω)=\frac{(10mA)(60Ω)}{(200μA)(200Ω)}

⇒ Voltage gain = 15