Question 226: Semiconductors and Logic Gates

Question

In a given circuit diagram, a 5 V zener diode along with a series resistance is connected across a 50 V power supply. The minimum value of the resistance required, if the maximum zener current is 90 mA will be __________ $$\Omega$$.

Accepted Answer

$$I = {{50 - {V_z}} \over R} = {5 \over {{R_L}}} + 90 	imes {10^{ - 3}}$$
For R
L
$$	o$$ $$\infty$$
R = 500$$\Omega$$

Semiconductors and Logic Gates

In a given circuit diagram, a 5 V zener diode along with a series resistance is connected across a 50 V power supply. The minimum value of the resistance required, if the maximum zener current is 90 mA will be __________ $\Omega$.

Choose the correct answer: