Question 1

When a triac is connected in an AC circuit, the output voltage is alternating current.

Accepted Answer

A triac controls the flow of AC power, allowing the output to remain as alternating current, but with the ability to adjust the phase and hence the power delivered to the load.

Question 2

The resistance can be adjusted to permit the triac to fire when the AC waveform reaches its peak value. This will cause one-____ of the AC voltage to be dropped across the triac.&#10;A) fifth&#10;B) fourth&#10;C) third&#10;D) half

Accepted Answer

When the triac fires at the peak of the AC waveform, it effectively allows the current to pass through for half of the AC cycle, resulting in half of the AC voltage being dropped across the triac.

Question 3

The triac is a PNPN junction connected parallel to a(n) ____________________ junction.

Accepted Answer

NPNP

Question 4

The triac operates in a manner similar to that of two connected ____.&#10;A) SCRs&#10;B) resistors&#10;C) ICs&#10;D) capacitors

Accepted Answer

A triac operates similarly to two silicon-controlled rectifiers (SCRs) connected in antiparallel, allowing it to conduct current in both directions when triggered.

Question 5

The triac is a member of the thyristor family, which means that it has only two states of operation, on and off.

Accepted Answer

The triac, like other thyristors, operates in two states: it is either fully on (conducting) or fully off (non-conducting), controlling AC power by switching between these states.

Question 6

Why is the triac popular in industrial circuits?

Accepted Answer

The answer of Why is the triac popular in industrial...

Question 7

To obtain complete voltage control, the triac, like the SCR, must be ____________________.

Accepted Answer

The answer of To obtain complete voltage control, the triac,...

Question 8

Describe how a triac can be tested.

Accepted Answer

The answer of Describe how a triac can be tested....

Deck 52: The Triac