Question 1

The triac is a PNPN junction connected in series with an NPNP junction.

Accepted Answer

A triac is a three-terminal electronic component that is essentially a bidirectional thyristor, consisting of two PNPN layers within a single silicon chip, not a PNPN junction in series with an NPNP junction.

Question 2

The triac has only two states of operation, on or off.

Accepted Answer

The triac is a semiconductor device that can function as a switch in AC circuits. It can operate in one of two states: on (conducting) or off (non-conducting).

Question 3

Which of the following is a characteristic of a triac?&#10;A) ability to control a large amount of voltage and current&#10;B) very popular in industrial circuits as a DC switch&#10;C) vulnerable to dirt and moisture&#10;D) operates at a maximum of 100 times per second

Accepted Answer

A triac is a solid-state device that is used for switching, phase control and other AC applications. It has the ability to control a large amount of voltage and current, making it useful in a wide range of applications such as lighting, motor control, and heating.

Question 4

The triac is used as the input of many solid-state relays.

Accepted Answer

The answer of The triac is used as the input...

Question 5

The triac is a member of the ____ family.&#10;A) thyristor&#10;B) SIDAC&#10;C) diac&#10;D) TSPDs

Accepted Answer

Triac is a type of thyristor which is used in AC circuits for controlling power. SIDAC, diac, and TSPDs are electronic components, but they are not members of the thyristor family.

Question 6

The triac can be used to control an AC voltage.

Accepted Answer

The triac is a semiconductor device that works as a switch and can control the flow of AC current, making it a useful component for controlling AC voltage.

Question 7

The triac, like the SCR, must be phase shifted if complete voltage control is to be obtained.

Accepted Answer

The triac, like the SCR, is a type of thyristor and requires phase shifting to achieve complete voltage control.

Question 8

The triac operates similar to two SCRs in parallel, facing in opposite directions with their gate leads ____.&#10;A) arranged as a diac&#10;B) connected together&#10;C) arranged for semiconduction&#10;D) insulated

Accepted Answer

The gate leads of the two SCRs in a triac are connected together. This allows for the device to be triggered by either a positive or negative voltage.

Question 9

When a triac is connected in an AC circuit, the output voltage will be ____.&#10;A) higher than normal&#10;B) AC&#10;C) lower than normal&#10;D) DC

Accepted Answer

A triac is a bidirectional device that can conduct current in both directions. When connected in an AC circuit, it allows current to flow in both directions, resulting in an AC output voltage. It does not affect the amplitude of the voltage, so the output voltage will be the same as the input voltage.

Question 10

When an SCR is connected in an AC circuit, the output voltage will be ____.&#10;A) higher than normal&#10;B) AC&#10;C) lower than normal&#10;D) DC

Accepted Answer

When an SCR is connected in an AC circuit, the output voltage will be DC because SCR is a unidirectional device that allows current to flow in only one direction.

Deck 56: The Triac