Yes, Zener diode have polarity Anode (+) and Cathode (-).
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.
Can we use a zener diode as a rectifier?
Last Answer : Yes we can use zener diode as rectifier but it have limitations better to use normal diode. Zener diode have some different applications.
Last 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.
Last Answer : Yes dynamic impedance of zener diode vary.
Last 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.
Last 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.
Should I use diodes?
Last Answer : So you have three camera flashes that are attached to a single capacitor, or three camera flashes attached to different capacitors?
What causes diodes to fail in alternator?
Last Answer : alternator
Polarity Test of Transformer
Last Answer : Polarity Test of Transformer
Why phasing out and polarity test is carried out on three phase transformer?
Last Answer : The phasing out test is carried out to identify the windings (primary and secondary) of corresponding phase of the three phase transformer. The polarity test is carried out to identify the ... identical polarity of the primary and secondary windings of each phase of the three phase transformer.
What is the need of polarity marking in polyphase AC circuits?
Last Answer : Need of Polarity Marking in Polyphase AC Circuits: i) Polarity marking of terminals provides reference polarity for better understanding of system, even if the polarity of ac voltage changes ... of current transformers in relay protection circuit and getting desired performance is very difficult.
To determine the polarity of the voltage drop across a resistor, it is necessary to know?
Last Answer : To determine the polarity of the voltage drop across a resistor, it is necessary to know direction of current through the resistor.
Last Answer : In D.C. generators the polarity of the interpoles is the same as that of the main pole ahead.
In MOSFET, the polarity of the inversion layers is the same as that of?
Last Answer : In MOSFET, the polarity of the inversion layers is the same as that of majority carriers in the source.
Draw symbols of zener diode and LED.
Last Answer : Symbol of zener diode : Symbol of LED
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 ?
Explain zener breakdown and avalanche breakdown.
Last 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.
State any two applications of zener diode.
Last 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.
List specification of zener diode
Last Answer : 1. Zener Voltage 2. Maximum Zener current 3. Power dissipation 4. Operating temperature 5. Dynamic Resistance
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
Last 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
How can you identify a zener diode?
Last Answer : It conducts current in either direction.
Why donor and receiver atoms can't move when sufficient voltage is supplied if they have charge Thanks
Silicon diodes designed for a specific reverse breakdown voltage, become useful as an electronic power supply voltage regulator, called _____________. A. tunnel diodes B. hot-carrier diodes C. compensating diodes D. Zener diodes
Last Answer : Answer: D
Are diodes polarity sensitive?
Last Answer : Need answer
which of the following accurately describes junction diodes? -General Knowledge
Last Answer : A semiconductor rectifying device in which the barrier between the two regions of opposite conductivity (n-type and p-type) type produces the rectification: accurately describes junction diodes.
How many types of diodes ?
Last Answer : 2 types of diodes
For which one of the following, 'Diodes' are generally used for? (1) Rectification (2) Amplification (3) Modulation (4) Filtration
Last Answer : (1) Rectification Explanation: In electronics, a diode is an electronic device that allows current to flow in one direction only. It is mainly used as a rectifier diode that lets ... used for power supply operation. Rectifier diodes are used for changing alternating current into direct current.
For which one of the following, "Diodes' are generally used for? (1) Rectification (2) Amplification (3) Modulation (4) Filtration
Last Answer : (1) Rectification Explanation: A rectifier diode is a two-lead semiconductor that allows current to pass in only one direction. Many types of diodes are used for a wide range of applications. Rectifier diodes are a vital component in power supplies
Light Emitting Diodes (LED) is used in fancy electronic devices such as toys emit (1) X-rays (2) ultraviolet light (3) (4) All of the above (4) radio waves
Last Answer : (4) All of the above Explanation: A light-emitting diode (LED) is a semiconductor light source that emits light when current flows through it. Infrared LEDs are used in remote-control circuits, such as those used with a wide variety of consumer electronics.
A NOT gate can be implemented by: (1) a single diode (2) two diodes (3) a single resistor (4) a single transistor
Last Answer : (4) a single transistor Explanation: In digital logic, an inverter or NOT gate is a logic gate which implements logical negation. An inverter circuit outputs a voltage representing the opposite ... be constructed using a single NMOS transistor or a single PMOS transistor coupled with a resistor.
In the illustrated circuit, if the input to leads 'B' and 'Y' was 24 VDC the output between 'A' and 'X' will be _________. EL-0069 A. 24 VDC B. 22.8 VDC, 24 VDC minus the 1.2 VDC voltage drop across two diodes C. undeterminable without knowing the turns ratio of the transformer D. 0 VDC
Last Answer : Answer: D
Routine maintenance of a ship's service alternator should include ______________. A. changing the pedestal bearing insulation yearly B. megger testing of all rectifying diodes C. lubricating excitation slip rings D. periodic cleaning of the air filters or screens
Last Answer : Answer: D
Which of the devices listed is indicated by the symbols lettered 'A' to 'F', shown in the illustration? EL-0016 A. Diodes B. Linear inductors C. Capacitors D. Transistors
Last Answer : Answer: A
High vacuum diodes, gas-filled diodes, and germanium semiconductor diodes may all be used as _____________. A. potentiometers B. rectifiers C. power sources D. photocells
Last Answer : Answer: B
Heat sinks are frequently used with _____________. A. power transistors B. vacuum tubes C. tunnel rectifier diodes D. all of the above
Last Answer : Answer: A
The use of four diodes, in a full-wave bridge rectifier circuit, will __________. A. provide unidirectional current to the load B. allow a very high leakage current from the load C. convert direct current to alternating current D. offer high opposition to current in two directions
Last Answer : Answer: A
What types of inverters require feedback diodes?
Last Answer : VSI with RL load.
Why diodes should be connected in antiparallel with the thyristors in inverter circuits?
Last Answer : For RL loads, load current will not be in phase with load voltage and the diodes connected in antiparallel will allow the current to flow when the main thyristors are turned off. These diodes are called feedback diodes.
What are the advantages of freewheeling diodes in a controlled in a controlled rectifier?
Last Answer : a. Input power factor is improved. b. Load current waveform is improved and thus the load performance is better.
What is the function of freewheeling diodes in controlled rectifier?
Last Answer : It serves two process. a. It prevents the output voltage from becoming negative. b. The load current is transferred from the main thyristors to the freewheeling diode, thereby allowing all of its thyristors to regain their blocking states.
Mention the different types of diodes and one use of each.
Last Answer : a) Light Emitting Diode (LED): They are used in lighting, display units of electric and electronic devices. b) Zener diode: It is used in voltage stabilizers. c) Photodiode: It is used in light sensitive semiconductors. d) Laser diode: It is used in fiber optical fibre communications.
Vacuum tubes have been replaced by-----? A. Conductors B. Diodes C. Transistors (Answer) D. None of these
Last Answer : C. Transistors (Answer)
Define semiconductor diodes.
Last Answer : It is a device in which electric current can flow in one direction. It has 2 terminals P and N.
Current limited power supplies can prevent damage to A) Rectifier diodes and power transformers. B) Pass transistors C) Other circuits in the system D) All of the above.
Last Answer : D) All of the above.
What type of logic family uses diodes in the input?
Last Answer : DTL (diode transistor logic).
What resistance property is found in tunnel diodes but not in normal diodes?
Last Answer : Negative resistance.
What is the main difference in construction between normal PN junction diodes and tunnel diodes?
Last Answer : The amount of doping.
Specify the mechanism that SLDs lack that is required by laser diodes to achieve lasing.
Last Answer : SLDs have no built-in optical feedback mechanism.
Why are LEDs preferred over laser diodes for low- and moderate-frequency analog applications?
Last Answer : LEDs require less complex circuitry than lasers.
What causes the negative-resistance property of tunnel diodes?
Last Answer : The tunneling action
For laser diodes, the term ____________________ is used instead of bandwidth.
Last Answer : linewidth