engineering recuitment MAHATRANSCO AE Electrical Mock Test Analog Electronics Diodes and Its Applications
In the voltage regulator shown in the figure, the load current can vary from 100 mA to 500 mA. Assuming that the Zener diode is ideal (i.e. The Zener knee current is negligibly small and Zener resistance is Zero in the breakdown region), the value of R is
1
7 Ω
2
70 Ω
3
70/3 Ω
4
14 Ω
5
140 Ω