The diac is non-conducting until the
A) voltage across it exceeds the breakover voltage in either direction.
B) voltage across it goes below the breakover voltage.
C) gate triggers it on.
D) snubber turns it on.

Question

Quizplus · Accepted Answer

The diac is a two-terminal device with no gate terminal. Therefore, it does not have a gate that can trigger it on. Instead, the diac is non-conducting until the voltage across it exceeds the breakover voltage in either direction. Once the voltage reaches this level, the diac switches on and conducts until the voltage drops below the breakover level. Therefore, option A is the best choice. Option B is incorrect because the diac conducts when the voltage across it is above the breakover voltage, not below it. Option C is incorrect because the diac does not have a gate terminal. Option D is incorrect because a snubber circuit is used to suppress voltage spikes, and it does not turn the diac on.

The Diac Is Non-Conducting Until the