Q. A diac is a similar 4-layer device but does not have a __ terminal.

A
Source
B
Drain
C
Gate
D
None of the above
Solution:

A triac is a 4-layer semiconductor device with two power terminals (MT1 and MT2) and a gate terminal. It is used as a power control device for 50/60Hz AC mains applications. It is placed in series with the load connected across the mains. … A diac is a similar 4-layer device but does not have a gate terminal.

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