i think both..........since it is a diode it just needs a connection for lightin up....
Both leads of an LED conductivity probe are dipped in water,dried and then dipped in mercury. in which liquid the LED light up.
1) water
2) Hg
3) Both
4) None
-
UP 0 DOWN 0 0 1
1 Answers
Akand
·2009-04-07 02:41:39