railway RRB JE (CBT I + CBT II) Mock Test 2024 Analog Electronics Diodes and Its Applications Zener Diodes
In the circuit shown below 18 V Zener diode has zero Zener resistance and a knee current of 2 mA. The minimum value of R so that voltage across it does not fall below 18 V is:
1
1000 Ω
2
500 Ω
3
9000 Ω
4
2000 Ω