SCR and TRIAC Quiz

Which of the following is the primary control parameter for turning on an SCR?

• Gate current

• Anode voltage

• Cathode current

• Forward breakover voltage

What is the main advantage of using a TRIAC over an SCR in AC applications?

• Higher current handling capacity

• Ability to conduct in both directions

• Lower gate trigger voltage

• Faster switching speed

When an SCR is in the forward blocking state, the anode current is:

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OFF

The term "latching current" in SCR refers to:

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OFF

Which of the following best describes the turn-off process of an SCR?

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OFF

A TRIAC can be triggered into conduction by:

• Positive gate current only

• Negative gate current only

• Both positive and negative gate currents

• Gate current is not required

Which characteristic of an SCR ensures that it remains in the off state until the gate current is applied?

• Forward breakover voltage

• Reverse blocking capability

• Holding current

• Gate trigger current

In a TRIAC, the term "quadrant" refers to:

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OFF

What happens to the SCR if the gate current is applied when the anode is negatively biased?

• The SCR will turn on.

• The SCR will remain off.

• The SCR will enter reverse conduction mode.

• The SCR will be damaged.

Which of the following conditions is necessary to turn off a TRIAC?

• Reduce the gate current to zero.

• Increase the anode current.

• Decrease the anode voltage to zero.

• Reverse the polarity of the anode voltage.