ASVAB Electronics Information Practice Test 185208

Question 1 of 5

A diode allows current to pass easily in one direction and blocks current in the other direction. Diodes are commonly used for rectification which is the conversion of alternating current (AC) into direct current (DC). Because a diode only allows current flow in one direction, it will pass either the upper or lower half of AC waves (half-wave rectification) creating pulsating DC. Multiple diodes can be connected together to utilize both halves of the AC signal in full-wave rectification.

What kind of diode allows current to flow in the opposite direction once a certain voltage threshold is reached?

standard diode

zener diode

v-type diode

light emitting diode