Exam 11: Thyristors

If a SCR is triggered near 45° of the ac cycle, it will conduct for approximately

A device that can be used to control a dc motor from an ac source is

The gate terminal of a PUT always is biased on.

Figure 2 -Refer to Figure 2. The symbol is for a

The internal base1 resistance for a UJT (r'B1)is controlled by the

An SCR can conduct current in either direction.

Figure 4 -Refer to Figure 4. The symbol for a diac is

Assume that a UJT has y = 0.70 when VBB = 10 V. The peak- point emitter voltage is

A device that has a negative resistance region is a

The conduction angle of an SCR is controlled by the

A device that does not have a gate terminal is

Figure 5 -Refer to Figure 5. Q1 is a

Figure 3 -Refer to Figure 3. The characteristic is for

Figure 4 -Refer to Figure 4. The symbol for an SCS is

In an SCR, reverse- breakdown voltage VBR(R)is defined at the start of the