please help me for solving this quesion




In the circuit shown below, the knee current of ideal zener diode is 10 mA. To maintain 5 volts across the load RL, the minimum value of RL in Ω’s and the minimum power rating of the zener diode in mW respectively are


a.125 and 125
b.125 and 250
c.250 and 125
d.250 and 250

 

In order for us to help you, we need to see YOUR best effort at working YOUR homework. It doesn't have to be correct or complete, but we need to see what approach you are trying and what your thinking appears to be so that we can tell where you are going right and where you are struggling.

For a hint, look at the worst case situation in which the zener is about to fall out of regulation.