A 6 V zener diode volteage regulator circuit is shown in figure has maximum current rating of 50 mA. Knee current of zener diode is 5 mA.
If Vs = 24 V, Rs = 300 Ω, then the range of RL is
1
218 Ω ≤ RL ≤ 300 Ω
2
218 Ω ≤ RL ≤ 600 Ω
3
109 Ω ≤ RL ≤ 300 Ω
4
109 Ω ≤ RL ≤ 600 Ω