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Description : Draw symbols of zener diode and LED.

Answer : Symbol of zener diode : Symbol of LED

Description : While studying the V-I characteristics of a zener diode, there are two different values of resistors connected in series with it. In case of the forward characteristics, a ~70 ohm resistor is connected ... ~510 ohm resistor. What is the reason behind it ? Is the difference really necessary ?

Description : Explain zener breakdown and avalanche breakdown.

Answer : The Zener Breakdown and Avalanche Breakdown are two different mechanisms by which a PN junction breaks. The Zener and Avalanche breakdown both occur in diode under reverse bias. The avalanche breakdown ... in the PN junction and causes breakdown. The process is known as the Avalanche breakdown.

Description : State any two applications of zener diode.

Answer : Applications of Zener Diode: i) As a voltage regulator. ii) As a fixed reference voltage provider in transistor biasing circuits. iii) As peak clippers or limiters in wave shaping circuits.

Description : List specification of zener diode

Answer : 1. Zener Voltage 2. Maximum Zener current 3. Power dissipation 4. Operating temperature 5. Dynamic Resistance 

Description : A zener voltage regulator has load requirements of 12 V and 2 A. The zener diode minimum current requirement is 0.2 A. The minimum voltage at input is 24 V. What is the required value of series resistance with source? A) 5.45 Ω B) 6 Ω C) 7.2 Ω D) 6.38 Ω  

Answer : A zener voltage regulator has load requirements of 12 V and 2 A. The zener diode minimum current requirement is 0.2 A. The minimum voltage at input is 24 V. What is the required value of series resistance with source? A) 5.45 Ω B) 6 Ω C) 7.2 Ω D) 6.38 Ω  

Description : How can you identify a zener diode?

Answer : It  conducts  current  in  either  direction.

Description : Do Zener diodes have polarity?

Answer : Yes, Zener diode have polarity Anode(+) and Cathode (-). And Zener Diode are connected into circuit with their cathode as positive terminal because they operate in reverse bias mode.

Description : Can we use a zener diode as a rectifier?

Answer : Yes we can use zener diode as rectifier but it have limitations better to use normal diode. Zener diode have some different applications.

Answer : PN junction of zener diode is heavily doped than ordinary diode. For the occurrence of Zener effect the zener diode is heavily doped. If the zener diode is not heavily doped then Zener effect ... breakdown voltage is sharp. If the diode is lightly doped the diode will have higher breakdown voltage.

Answer : Yes dynamic impedance of zener diode vary.

Answer : Yes, Zener diode is a voltage regulator. Zener diode maintain constant reverse Biased Voltage. If the current is varying then also zener diode maintain constant voltage.

Answer : Yes it can be, and it will act like a normal PN junction diode. The characteristic of ZENER diode is exactly same as PN junction diode in forward Bias.

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