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  • The output characteristics of a transistor is shown in the figure. When is 10 V and <img alt="I_{C}=4.0\; mA," src="http://entrancecorner.codecogs.com/gif.latex?I_%7BC%7

The output characteristics of a transistor is shown in the figure. When V_{CE} is 10 V and I_{C}=4.0\; mA, then value of \beta _{ac} is _________
Option: 1 150
Option: 2 300
Option: 3 450
Option: 4 75

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\begin{array}{l} \Delta I_{B}=(30-20)=10 \mu \mathrm{A} \\ \\ \Delta I_{C}=(4.5-3) \mathrm{mA}=1.5 \mathrm{~mA} \\ \\ \beta_{\mathrm{ac}}=\frac{\Delta \mathrm{I}_{\mathrm{C}}}{\Delta \mathrm{I}_{\mathrm{B}}}=\frac{1.5 \mathrm{~mA}}{10 \mu \mathrm{A}}=150 \\ \\ \beta_{\mathrm{ac}}=150 \end{array}

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Deependra Verma

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