how can you test a diode if it is defective?
2007-01-27 19:02:44 · 2 個解答 · 發問者 tungmaggie 3 in 科學 ➔ 其他：科學
Construct a simple circuit with a cell, ammeter, resistor and the diode under test.
Test both directions of the cell connection.
If current flows in both direction or does not flow in both direction, then the diode is defective.
Normally, diode only allows current flow in 1 direction (forward bias)
2007-01-27 19:14:03 · answer #1 · answered by 魏王將張遼 7 · 0⤊ 0⤋
The most simple way is to use a multi-meter to measure its resistances in the forward and reverse bias directions.
2007-01-27 19:46:45 · answer #2 · answered by 天同 7 · 0⤊ 0⤋