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JIPMER 2004
Exam
JIPMER
Year
2004
Subject
Physics
Chapter
Semiconductors

JIPMER 2004 · Physics · Semiconductors

In the C B mode of a transistor, when the collector voltage is...

In the CBC B mode of a transistor, when the collector voltage is changed by 0.5 volt, the collector current changes by 0.05 mA . The output resistance will be

Options

  1. A10kΩ10 \mathrm{k} \Omega
  2. B20kΩ20 \mathrm{k} \Omega
  3. C5kΩ5 \mathrm{k} \Omega
  4. D2.5kΩ2.5 \mathrm{k} \Omega

Correct answer

A. 10kΩ10 \mathrm{k} \Omega

Step-by-step solution

Here: ΔVc=0.5volt,ΔIc=0.05mA=0.05×10−3A\begin{aligned}& \Delta V_c=0.5 \mathrm{volt}, \\ & \Delta I_c=0.05 \mathrm{ mA}=0.05 \times 10^{-3} \mathrm{ A} \end{aligned} Output resistance is given by Rout =ΔVcΔIc=0.50.05×10−3=104Ω=10KΩ\begin{aligned} R_{\text{out }} & =\frac{\Delta V_c}{\Delta I_c} \\ & =\frac{0.5}{0.05 \times 10^{-3}}=10^4 \Omega=10 \mathrm{ K} \Omega\end{aligned}
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