Question 497Electricity & Electronics - Assistant Engineer

The correct answer is B) zener diode. The zener diode is the component labeled CR1 in the regulated DC power supply illustrated in section "D" of the diagram EL-0085. Zener diodes are commonly used in regulated power supplies to maintain a constant output voltage, which is a critical function in this type of circuit. The other answer choices are incorrect because: A) A rectifier diode is used to convert AC to DC, but is not the specific component labeled CR1 in this regulated power supply circuit. C) A tunnel diode is a specialized semiconductor device used for specific applications, but is not the component shown as CR1 in this power supply diagram. D) A diac is a bidirectional trigger diode used in AC circuits, which is not the same as the unidirectional zener diode shown as CR1 in this DC power supply.