Talk:Backward diode

I read about zener diode but I have a question. when we test a zener diode in one way and in the opposite way it's reading double. what is the diode called?

how i can test the diode revese voltage value? —Preceding unsigned comment added by 119.153.10.49 (talk) 07:55, 5 April 2010 (UTC)

Symbol is not correct, see User_talk:Dicklyon