A crowbar is used to:
A) vary the voltage to a load.
B) prevent phase shift oscillations.
C) protect a voltage-sensitive load from excessive voltage.
D) eliminate false triggering.
Chapter 20 Thyristors and Optoelectronics Devices Answer Key
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Q20: The primary difference between the diac and
Q21: Light current through a photodiode is generally
Q22: The speed of light c) is .
A)
Q23: An optoisolator is a device that uses
Q24: A phase controller is used to:
A) vary
Q25: Optoelectronic devices are divided into two types:
A)
Q26: Photodiodes are normally biased.
A) forward
B) reverse
C) negatively
D)
Q27: The solid-state relay contains an internal
A) optocoupler.
B)
Q28: Irradiance is:
A) The term used to describe
Q29: An optocoupler has an isolation source voltage
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