Which device is used to get a constant DC voltage from the DC unregulated output of a rectifier?
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A.
Zener diode
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B.
Rectifier
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C.
Forward biased p-n junction
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D.
Photo diode
Correct Answer:
A. Zener diode
Explanation:
A Zener diode is a specialized type of semiconductor device designed to operate reliably in the reverse-biased breakdown region. When the unregulated DC voltage from a rectifier exceeds a specific threshold known as the Zener voltage, the diode maintains a nearly constant voltage across its terminals despite fluctuations in the input or load current. This unique characteristic makes it an ideal component for voltage regulation, ensuring a stable and consistent DC output for electronic circuits.
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