Multiple choice general knowledge science & technology The voltage after which the diode starts conducting heavily is called Peak Inverse voltage Knee Voltage Breakdown voltage Conducting Voltage Reveal answer Fill a bubble to check yourself B Correct answer Explanation Knee Voltage (or cut-in voltage) is the minimum forward voltage at which a diode starts conducting heavily. Below this voltage, current is negligible. For silicon it's about 0.7V, for germanium about 0.3V.