Assertion: diode's voltage | /r/HasProperty | needed
Facets:
value: to keep current flowing
type: PURPOSE
Source sentences:
text: This voltage is needed so that the electrons of the n junction can have enough push to break the barrier in between and cross over into the p junction.
text: If you try to switch off the current in an inductor suddenly, it will make whatever voltage is necessary to keep the current flowing in the short term.
text: Therefore, not as strong a voltage is needed to create current flow across the junction.
text: For the very highest powers, each arm of the bridge may consist of tens or hundreds of separate devices in parallel (where very high current is needed, for example in aluminium smelting) or in series (where very high voltages are needed, for example in high-voltage direct current power transmission).
text: Taking this idea a bit further, you can actually build a full multi-rail power supply using nothing more exotic than a set of Zener diodes to generate all the voltages that are needed, provided that the current requirements are modest on the different supply voltages.
text: a small voltage is needed before a diode starts