Deck 51: The Diac

Question 1

What is negative resistance?

Answer 1

When the diac fires, it displays a negative resistance, which means that it will conduct at a lower voltage than the voltage needed to turn it on.

Question 2

Because the diac is a bidirectional device, it will conduct on either half cycle of the alternating current applied to it.

Answer 2

True

Question 3

Voltage applied to the diac must reach a predetermined level before the diac will activate.

Answer 3

True

Question 4

The simplest way to summarize the operation of the diac is to say that it is a voltage-sensitive AC ____________________.

Question 5

The primary function of the diac is to phase shift a(n) ____________________.

Question 6

What is the difference between the operations of a diac and a UJT?

Question 7

There is (are) ____ schematic symbol(s) for the diac.

A) one
B) two
C) three
D) four

Question 8

The diac can operate ____ polarity.

A) only on positive
B) only on negative
C) on either
D) only without