Question 234: Semiconductors and Logic Gates

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 .................... $$\Omega$$.

Accepted Answer

P = Vi
0.5 = 8i
i = $${1 \over {16}}$$A
E = 20 = 8 + i R
p
R
p
= 12 $$	imes$$ 16 = 192$$\Omega$$

Semiconductors and Logic Gates

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 .................... $\Omega$.

Integer / Numeric Answer Type