Power Electronics
A triac can pass a portion of ___________ half-cycle through the load.

None of these
Only negative
Only positive
Both positive and negative

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Power Electronics
An SCR is considered to be a semi controlled device because

 it can be turned OFF but not ON with a gate pulse.
 it conducts only during one half cycle of an alternating current wave.
 it can be turned ON only during one half cycle of an AC.
 it can be turned ON but not OFF with a gate pulse.

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