I am reading through Complete Electronics Self-Teaching Guide with Projects, which has turned out to be a fantastic resource for quickly learning electronics basics. But I've come across an example in the section about diode breakdown and burnout that has me completely confused.
When I tried to calculate this before I looked at the answer, I came up with 5K for the resistor (I think the 100V on the right is saying the voltage there should be 100, making the drop across the resistor 100V, so 100V/.02A = 5K).
Obviously, this doesn't match with the answer provided. It looks like I was right about the drop, but why are we suddenly talking about a full ampere? I thought I was supposed to be calculating for 20mA?
Am I completely misunderstanding this example, or is there a problem in the example itself? Thanks in advance for your help.