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Zener breakdown occurs when reverse bias of voltage is approximately
- a)2 - 4 V
- b)0.1 - 2 V
- c)4 - 6 V
- d)10 V
Correct answer is option 'C'. Can you explain this answer?
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Zener breakdown occurs when reverse bias of voltage is approximatelya)...
Zener diodes:
- Zener diodes are a special kind of diode, which permits current to flow not only in the forward direction but also allow current to flow in the reverse direction when the reverse voltage is above a certain value, due to the Zener and avalanche effect.
- The Zener effect is a type of electrical breakdown that occurs in a reverse-biased p - n diode when the electric field due to high reverse bias voltage 4 - 6 V(near 5 V) enables tunneling of electrons from the valence to the conduction band of a semiconductor, leading to a large number of free minority carriers which suddenly increase the reverse current.
- At even higher reverse voltages (> 8 V) the Zener diode minority carriers accelerated by reverse voltage collide with the stationary atoms and break covalent bonds freeing electrons for conduction. This effect that drastically increases current is called avalanche breakdown.
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Zener breakdown occurs when reverse bias of voltage is approximatelya)...
Zener Breakdown Voltage
Zener breakdown occurs when the reverse bias voltage applied across a Zener diode reaches a certain threshold value.
Threshold Voltage
The typical voltage range for Zener breakdown is between 4 - 6 V. This means that when the reverse bias voltage across the Zener diode reaches this range, the Zener breakdown phenomenon occurs.
Characteristics of Zener Breakdown
- When Zener breakdown occurs, the Zener diode allows current to flow in the reverse direction without getting damaged.
- This characteristic makes Zener diodes useful for voltage regulation and protection in circuits.
Applications
Zener diodes are commonly used in voltage regulator circuits to maintain a constant output voltage despite variations in input voltage or load conditions.
Conclusion
Understanding Zener breakdown and its characteristics is important for designing reliable and stable electronic circuits. By selecting the appropriate Zener diode with the desired breakdown voltage, engineers can ensure the proper functioning of their circuits.
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Zener breakdown occurs when reverse bias of voltage is approximatelya)2 - 4 Vb)0.1 - 2 Vc)4 - 6 Vd)10 VCorrect answer is option 'C'. Can you explain this answer?
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