Semiconductors

JEE Main level, numerical answer, medium

73 of 209

Question 73 of 209

A zener diode having zener voltage 8V8V and power dissipation rating of 0.5W0.5W 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 Rp{R}_{p} is _____Ω.\Omega .

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Answer: 192

P=ViP=Vi
0.5=8i0.5=8i
i=116Ai=\dfrac{1}{16}A
E=20=8+iRPE=20=8+i{R}_{P}
RP=12×16=192Ω{R}_{P}=12\times 16=192\Omega

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