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JEE MAIN 2021
20-07-21 S2
Question
A zener diode having zener voltage 8 V and power dissipation rating of 0.5 W is connected across a potential divider arranged with maximum potential drop across zener diode is as shown in the diagram. The value of protective resistance $R_p$ is $\_\_\_\_$ $\Omega$.
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Solution
P = Vi , 0.5 = 8i i = 1/16 A E = 20 − 8 + iRp Rp = 12 × 16 = 192 Ω
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