NEET Exam > NEET Videos > Physics Class 12 > Zener Diode
Zener Diode Video Lecture | Physics Class 12 - NEET
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FAQs on Zener Diode Video Lecture - Physics Class 12 - NEET
| 1. What is a Zener diode and how does it work? |  |
Ans. A Zener diode is a type of diode that operates in the reverse breakdown region. It is designed to have a specific breakdown voltage, known as the Zener voltage. When the voltage across the Zener diode reaches this breakdown voltage, it starts conducting in the reverse direction, allowing current to flow. This characteristic makes it useful for voltage regulation and protection against voltage spikes.
| 2. What is the purpose of using a Zener diode in a circuit? | |
Ans. The main purpose of using a Zener diode in a circuit is voltage regulation. By connecting a Zener diode in parallel with a load, it can maintain a constant voltage across the load, even if the input voltage varies. This makes it ideal for applications such as voltage regulators, voltage references, and surge protection.
| 3. How is the breakdown voltage of a Zener diode determined? | |
Ans. The breakdown voltage of a Zener diode is determined during the manufacturing process. The diode is carefully doped to create a specific depletion region, which results in a desired breakdown voltage. By controlling the doping concentration, the breakdown voltage can be set to a specific value.
| 4. Can a Zener diode be used as a rectifier? | |
Ans. No, a Zener diode is not typically used as a rectifier. Unlike regular diodes, which are designed for rectification (converting AC to DC), Zener diodes are designed for voltage regulation. They are optimized for operation in the reverse breakdown region, which makes them unsuitable for rectification purposes.
| 5. What are some common applications of Zener diodes? | |
Ans. Zener diodes have various applications in electronics. Some common uses include voltage regulation in power supplies, protection against voltage spikes, voltage references for precision measurement instruments, noise reduction in audio circuits, and waveform clipping in signal processing.
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Nov 21, 2024 Last updated |
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