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A $8 \mathrm{~V}$ Zener diode along with a series resistance $\mathrm{R}$ is connected across a $20 \mathrm{~V}$ supply (as shown in the figure). If the maximum Zener current is $25 \mathrm{~mA}$ , then the minimum value of $\mathrm{R}$ will be_________ $\Omega .$

Option: 1
480

Option: 2
-

Option: 3
-

Option: 4
-

Answers (1)

best_answer

$\mathrm{I_2=25 \times 10^{-3} \mathrm{~A} }$

$\mathrm{I_R=12 \mathrm{~V}}$

For $\mathrm{\left(I_2\right)_{\max }, I_c}$ will be minimum and $\mathrm{ I}$ is maximum

$\mathrm{I R=25 \times 10^{-3} R =12 }$

$\mathrm{R =\frac{12000}{25}=480 \Omega}$

The minimum value of $\mathrm{R }$ will be will be $\mathrm{480\: \Omega}$

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Riya

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