Question 1 of 10
What does the acronym DIAC stand for?
DIAC stands for Diode for Alternating Current, indicating its bidirectional current conduction capability.
Question 2 of 10
Which of the following is a key characteristic of a DIAC?
A DIAC is designed to conduct current in both directions, making it a bidirectional device.
Question 3 of 10
What is the primary function of a DIAC in a circuit?
DIACs are commonly used to trigger TRIACs, enabling them to perform symmetrical switching in AC circuits.
Question 4 of 10
How many terminals does a DIAC have?
A DIAC has two terminals, typically labeled as MT1 and MT2.
Question 5 of 10
What triggers a DIAC to start conducting?
A DIAC begins to conduct when the voltage across it reaches or exceeds its break-over voltage (VBO).
Question 6 of 10
What is the key difference between a SCR and a TRIAC?
SCRs conduct in one direction, while TRIACs conduct in both directions, making TRIACs suitable for AC power control.
Question 7 of 10
Which of the following is NOT a terminal of SCR?
MT1 is a terminal of a DIAC or TRIAC, not an SCR.
Question 8 of 10
In which mode does the SCR not conduct, even if the anode is more positive than the cathode?
In forward blocking mode, the SCR is forward-biased but not triggered, so no current flows.
Question 9 of 10
What happens when you remove the gate pulse after an SCR enters the forward conduction mode?
Once an SCR is triggered into conduction, it remains on until the current drops below its holding current limit.
Question 10 of 10
How many PN junctions are there in an SCR?
An SCR consists of four semiconductor layers and three PN junctions.
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