THYRISTOR FAMILY

From the following list of devices, choose the device that only turns-on for a fixed-value of anode-cathode voltage

• PUT

• SCR

• SUS

• BJT

The SCS (Silicon Controlled Switch) is a

• two terminal device

• three terminal device

• four terminal device

• five terminal device

Which of the following devices provide complete isolation between triggering circuit and power circuit?

• PUT

• LASCR

• SUS

• DIAC

The TRIAC can be represented by

• two SCRs in anti-parallel

• two SCRs in parallel

• two diodes in anti-parallel

• two diodes in parallel

The SITH (Static Induction Thyristor) is a

• 4 terminal, self-controlled device

• 3 terminal, self-controlled device

• 4 terminal, un-controllable device

• 3 terminal, un-controllable device

The SITH has

• gate, anode, cathode

• base, collector, emitter

• base, anode, cathode

• gate, emitter, collector

The SITH is a

• normally-off device

• normally-on device

• uncontrollable device

• unpredictable

The SITH

• has high reverse blocking capabilities as compared to CTs

• has low reverse blocking capabilities as compared to CTs

• has no reverse blocking capabilities

The RCT (Reverse Conducting Thyristor) has

• a diode in series with the SCR

• a diode in anti-parallel with the SCR

• two SCR’s in anti-parallel

The TRIAC is most sensitive in the _________ quadrants

• 1st & 3rd with positive gate current

• 1st with positive gate current & 3rd with negative gate current

• 3st with positive gate current & 1rd with negative gate current

• 1st & 3rd with negative gate current