Thyristors and Tranducers Questions

• A TRIAC will control AC voltage during the positive half cycle only.
• The DIAC conducts in only one direction when gated on.
• A photodiode is a device that produces light.
• A DIAC is a bidirectional diode that has a symmetrical switching mode.
• The gate of a TRIAC can turn it on to have current flow in either direction.
• A thermistor is a semiconductor device that acts like a piezoresistive resistor.
• SCRs are four-layer devices that are either fully conducting or not conducting.
• A silicon-controlled rectifier (SCR) has 3 terminals labeled base, collector, and emitter.
• To turn an SCR off, simply remove the gate voltage.
• The optically coupled isolator interrupter module is used to transfer switching information between two electrically isolated points.
• A semiconductor using the hall effect will detect magnetic fields.