Define static and dynamic resistance of diode.

Define static and dynamic resistance of diode.
by

1 Answer

Answer :

Static resistance (Rf) :Static Resistance of a P-N junction diode is the ratio of forward voltage to forward current.

image 

Dynamic Resistance (rf): Dynamic Resistance of a P-N junction diode is the small change in forward voltage to small change in forward current at a particular operating point.

image  

by

Related questions

Draw V-I characteristics of p-n junction diode? Define static and dynamic resistance of diode.

Description : Draw V-I characteristics of p-n junction diode? Define static and dynamic resistance of diode.

Last Answer : Static Resistance: The resistance offered by a p-n junction diode when it is connected to a DC circuit is called static resistance.  (OR) It is the ratio of DC voltage applied across diode ... The dynamic resistance of a diode is the ratio of change in voltage to the change in current. 

Define dynamic resistance of diode. State, how it is calculated using forward characteristics of diode.

Description : Define dynamic resistance of diode. State, how it is calculated using forward characteristics of diode.

Last Answer : Definition: The resistance offered by the diode to the AC operating conditions is known as the Dynamic resistance' or Incremental resistance' or AC resistance' of a diode. It is ... Dynamic resistance is actually the reciprocal of the slope of the forward characteristics.

Define given parameters and state their values for bridge rectifier (i) Ripple factor (ii) PIV of diode.

Description : Define given parameters and state their values for bridge rectifier (i) Ripple factor (ii) PIV of diode.

Last Answer : Ripple Factor: Ripple Factor is defined as the ratio of RMS value of the AC component of output to the DC or average value of the output. Mathematically it is expressed as, ( ... which appears across non-conducting reverse biased diode. (ii) PIV of diode for bridge rectifier-Vm

Explain with neat sketch construction of PIN Diode. Draw its characteristics in reverse bias mode.

Description : Explain with neat sketch construction of PIN Diode. Draw its characteristics in reverse bias mode. 

Last Answer : Construction A PIN diode is made up of three semiconductor materials; two heavily doped P- and N- type material separated by an intrinsic (undoped) semiconductor (I) as shown in above figure ... . This advantage allows the PIN diode to process even weak signals.  Characteristics

State four applications of PIN diode.

Description : State four applications of PIN diode. 

Last Answer : i. Used in rectifier circuit. ii. Used in clipping and clamping circuit. iii. Used for A.M detection. iv. Used for voltage multiplier.

Draw the clipper circuit using series and shunt diode.

Description : Draw the clipper circuit using series and shunt diode.

Last Answer : Fig: A series negative clipper (OR) Fig: Series positive clipper Fig: Parallel positive clipper (OR) Fig: Parallel negative clipper

List four specifications of zener diode or P- N junction diode.

Description : List four specifications of zener diode or P- N junction diode.

Last Answer : Specifications of zener diode: 1. Zener voltage 2. Power dissipation 3. Maximum power dissipation PD(max) 4. Breakdown current 5. Dynamic resistance 6. Maximum reverse current. (OR) ... Reverse saturation current 5. Power dissipation 6. Junction temperature 7. Peak inverse voltage (PIV)

Write two applications of P-N junction diode and zener diode.

Description : Write two applications of P-N junction diode and zener diode. 

Last Answer : Application of P-N junction diode: Used in rectifier circuit Used in clipping and clamping circuit. Used for A.M detection Used for voltage multiplier. Application of Zener diode: It is ... . Used in protection circuits for MOSFET. Used in pulse amplifier. Used in clipping circuits.

State the working principle of LED and LASER diode.

Description : State the working principle of LED and LASER diode.

Last Answer : LED  Working principle of LED diode:An LED emits two light when electrical energy is applied to it.LED is a two terminal device.The terminals are named as anode (A) and the other as cathode(K). A ... with light: 1) Light absorption 2) Spontaneous emission 3) Stimulated emission

Describe the operating principle of PIN diode with neat sketch.

Description : Describe the operating principle of PIN diode with neat sketch.

Last Answer : Consider the structure of a PIN diode as shown in fig  A PIN diode operates under what is known as high-level injection.In other words,the intrinsic i region is flooded with charge ... results in faster operation of the diode,making it a suitable device for high frequency operations.

Draw the characteristics of tunnel diode and write two applications of it.

Description : Draw the characteristics of tunnel diode and write two applications of it.

Last Answer :  Characteristics:  Applications: 1. In the digital networks 2. As a high speed switch 3. As a high frequency oscillator 4. High speed computers

Draw the characteristics of tunnel diode, showing operating regions. State two applications of tunnel diode.

Description : Draw the characteristics of tunnel diode, showing operating regions. State two applications of tunnel diode.

Last Answer : Applications: One of the important application of a tunnel diode is in high speed computers where the switching times in the order of nanoseconds or picoseconds are desirable. A tunnel diode can be ... In digital networks. 2. As a high speed switch. 3. As a high frequency oscillator.

List applications of Schottky diode and Laser diode.

Description : List applications of Schottky diode and Laser diode.

Last Answer : Application of Schottky diode:  It is used in rectification of very high frequency signals. It is used in communication system circuits. It is used in AC to DC converters. It is used in Radar ... etc. It is used in welding. It is used as a light source in fibre optic communication.

Draw symbol and state one application of zener diode and LED.

Description : Draw symbol and state one application of zener diode and LED.

Last Answer : Diagram: Application of Zener diode:  It is used as voltage regulator. Used in protection circuits for MOSFET. Used in pulse amplifier. Used in clipping circuits. ... alarm systems 7-segment, 16- segment and dot matrix displays Indicating power ON/OFF conditions

Draw construction of Schottky diode and state it’s four applications.

Description : Draw construction of Schottky diode and state it’s four applications.

Last Answer : Applications :- 1. RF mixer and detector diode: 2. Power rectifier 3. Voltage clamping 4. Stand alone photovoltaic systems in order to prevent batteries from discharging purpose for the solar panels at night 5. Rectifiers in power supplies.

Draw and explain V-I characteristics of a P-N junction diode.

Description : Draw and explain V-I characteristics of a P-N junction diode.

Last Answer : V-I Characteristics of a P-N junction: V-I characteristics of a Diode: The V-I characteristics can be divided in two parts. 1. Forward characteristics. 2. Reverse ... plot a graph with reverse voltage on horizontal axis and current on vertical axis, we obtain reverse characteristics.

Draw symbol of (i) Tunnel diode (ii) LED

Description : Draw symbol of (i) Tunnel diode (ii) LED

Last Answer : (i) Tunnel diode: (ii) LED:

State any Four applications of PN junction diode.

Description : State any Four applications of PN junction diode.

Last Answer : 1. Rectifiers in power supplies, 2. Detectors in RF, 3 .Clippers, 4. In clamping networks used as DC Restorers, 5. As switches in digital logic circuits.

Describe the working principle of Laser Diode.

Description : Describe the working principle of Laser Diode.

Last Answer : When the P-N junction of a laser diode is forward-biased by an external voltage source, electrons move across the junction and recombination occurs in the depletion region which results in the ... point, a strong beam of laser light comes out of the partially reflective surface of the diode.

Compare P-N junction and Zener Diode.

Description : Compare P-N junction and Zener Diode.

Last Answer : P-N junction Zener Diode It conducts in only in one direction.  It conducts in both the directions. It is always operated in forward bias condition. It is always operated in ... . It cannot be used for rectification, but commonly used for voltage regulation

Describe the working of PN junction diode with neat sketch under forward biased condition.

Description : Describe the working of PN junction diode with neat sketch under forward biased condition.

Last Answer : If the p-region (anode) is connected to the positive terminal of the external DC source and nside (cathode) is connected to the negative terminal of the DC source then the biasing ... The large number of majority carriers crossing the junction constitutes a current called as the forward current.

Describe the operating principle of LASER diode with diagram.

Description : Describe the operating principle of LASER diode with diagram.

Last Answer : Operating Principle: There are three main processes in semiconductors that are associated with light: Light absorption Spontaneous emission Stimulated emission Stimulated emission is ... LASER special properties such as narrow spectral width and coherent output radiation. 

List any two applications of photo diode and IRLED

Description : List any two applications of photo diode and IRLED 

Last Answer : Photodiode 1. In the cameras for sensing the light intensity. 2. In CD players. 3. In the fiber optic receiver. 4. As photo (light) detector. 5. In light intensity meters. 6. In the ... shaft encoders 4. As a light source in optical fiber system 5. In the burglar alarm system.

List any two applications of Schottkey diode.

Description : List any two applications of Schottkey diode.

Last Answer : Application of Schottky diode: • It is used in rectification of very high frequency signals. • It is used in communication system circuits. • It is used in AC to DC converters. • It is used in Radar system. • It is used in switched mode power supply. 

List any four applications of laser diode.

Description : List any four applications of laser diode.

Last Answer : 1. As light source in fiber optic communication. 2. In the infrared spectrometers. 3. In the medical field. 4. In military applications. 5. To measure distance, alignment angle etc. 6. For flow ... . 9. For welding. 10. For sound recording and reproduction (in CD players) 11. In holography.

Draw and describe the VI characteristics of zener diode

Description : Draw and describe the VI characteristics of zener diode

Last Answer : A zener diode is operated only in the reverse-bias region. (generally written as VR) is increased, the reverse current (usually called zener current, IZ) remains negligibly small up to ... out of the breakdown region, when the applied reverse voltage is reduced below the breakdown voltage.  

Describe working of schottky diode with neat construction

Description : Describe working of schottky diode with neat construction

Last Answer : Applications: 1) RF mixer and Detector Diode. 2) Power Rectifier 3) Voltage Clamping 4) Stand-alone photovoltaic system in order to prevent batteries from discharging purpose for the ... . 7) Low Voltage Power Supply Circuits. 8) To rectify very high frequency signals.

Draw VI characteristics of Tunnel diode & describe it.

Description : Draw VI characteristics of Tunnel diode & describe it.

Last Answer : Symbol of TUNNEL DIODE operating principle of tunnel diode Working  The operation of tunnel diode is based on special characteristics known as negative resistance. The width of the ... tunneling & hence the name of the high impurity density PN junction is called as tunnel diode.

State the internal resistance of ideal current and ideal voltage source.

Description : State the internal resistance of ideal current and ideal voltage source.

Last Answer : The internal resistance of ideal current and ideal voltage source: Ideal voltage source has zero internal resistance  Ideal current source has infinite internal resistance 

Define rectification efficiency. Give its formula.

Description : Define rectification efficiency. Give its formula.

Last Answer : The ratio of output DC power delivered to the load to the applied input AC power is called rectification efficiency. It is denoted by η. η = Output DC power delivered to the load / Input AC power from transformer secondary η = Pdc / Pac

Define permeability and reluctivity of magnetic material.

Description : Define permeability and reluctivity of magnetic material. 

Last Answer : Permeability is the capability of a specific material to allow the flow of magnetic flux more easily. Thus higher permeability enables a material to pass more magnetic flux. Reluctivity is equal to the ratio of the intensity of the magnetic field to the magnetic induction of the material.

Define following terms: i) Active networks. ii) Unilateral networks

Description : Define following terms: i) Active networks. ii) Unilateral networks

Last Answer : i) Active networks: If a network consists of an energy source then it is called an active network. The type of energy source can be a voltage source or a current source. ii) ... direction of current through its elements in it, then the network is called as a unilateral network.

Define Ferromagnetic materials. Draw B- H Curve.

Description : Define Ferromagnetic materials. Draw B- H Curve.

Last Answer : Ferromagnetic materials: The materials which possess magnetism in the absence of applied magnetic field is known as ferromagnetic materials.

Define : (i) Efficiency (ii) TUF of Rectifier

Description : Define : (i) Efficiency (ii) TUF of Rectifier

Last Answer : Rectifier efficiency (ɳ) : it is defined as the ratio of DC power to the applied input AC power. Transformer utilization factor: It is defined as the ratio of the DC power available at the load resistor and the AC rating of the secondary coil of a transformer.

Define (i) Open circuit (ii) Short circuit.

Description : Define (i) Open circuit (ii) Short circuit.

Last Answer : Open circuit : An electrical circuit is said to be open,when any part of conducting path is open or broken and there is no continuity in the conducting path of an electrical circuit. Short circuit : An electrical circuit is said to be short,when voltage source has closed path across its terminal.

Define Inductor. Draw its symbol.

Description : Define Inductor. Draw its symbol. 

Last Answer : An inductor is a passive electronic component that stores energy in the form of a magnetic field  

Define: (1) Mesh (2) Sign conversion (3) Potential rise (4) Potential Drop

Description : Define: (1) Mesh (2) Sign conversion (3) Potential rise (4) Potential Drop

Last Answer : Mesh: A mesh is a closed path in a circuit with no other paths inside it.  Sign convention: In an electrical circuit, the notation given to the voltage drop across resistance and the ... because current flows from a higher to a lower potential then the potential drop is considered Negative.

Define clipper and clamper.

Description : Define clipper and clamper.

Last Answer : Clipper: The circuit with which the waveform is shaped by removing (or clipping) a portion of the applied wave is known as a clipper.  Clamper: A circuit that shifts either positive or negative peak ... a clamping circuits or clamper. These circuits are also called D.C. restorer or D.C. inserter

Define rectifier. State its types.

Description : Define rectifier. State its types.

Last Answer : A rectifier is defined as an electronic device which converts alternating (AC) voltage or current into unidirectional/ pulsating (D.C) voltage or current. Types of Rectifier: 1. Half wave rectifier 2. Full wave rectifier a. Centre tapped full wave rectifier b. Full wave bridge rectifier

Define self-inductance and mutual inductance.

Description : Define self-inductance and mutual inductance.

Last Answer : Self-inductance: As per the Lenz's law, the self-inducedemf opposes any current change taking place. This property of the coil to oppose any change in current flowing through it is known as the self- ... in the other coil placed nearby, by induction. It is denoted by M and measured in Henry.  

Define linear and non-linear wave-shaping circuit.

Description : Define linear and non-linear wave-shaping circuit.

Last Answer : Linear wave-shaping circuit  The circuit which makes use of only linear circuit elements is known as linear wave shaping circuits. Resistor, capacitor, inductor are used for the circuits. E.g. ... , transistor, resistors and capacitors etc. are used for the circuits. E.g. Clipper, Clamper

Define clipper. Draw circuit of negative shunt clipper.

Description : Define clipper. Draw circuit of negative shunt clipper.

Last Answer : Clipper: A clipper is a device designed to prevent the output of a circuit from exceeding a predetermined voltage level without distorting the remaining part of the applied waveform. OR Clipper: An ... the positive or negative peak or both from a specific level is known as clipper.

Define i)Linear network ii)Non-linear network iii)Bilateral network iv)Unilateral network

Description : Define i)Linear network ii)Non-linear network iii)Bilateral network iv)Unilateral network

Last Answer : Linear Network: If the characteristics, parameter such as resistances, capacitances, inductances etc. remain constant irrespective of changes in temperature, time, voltage etc. then the circuit or network ... current through its elements in it, then the network is called as a unilateral network.

Draw BH Curve and define coercivity and reluctivity.

Description : Draw BH Curve and define coercivity and reluctivity.

Last Answer : BH Curve: Definitions: Coercivity: For ferromagnetic material the coercivity is the intensity of the applied magnetic field required to reduce the magnetization of that material to zero after the ... to the ratio of intensity of the magnetic field to the magnetic induction of the material. 

Define self and mutual induced emf.

Description : Define self and mutual induced emf.

Last Answer : Self-induced emf: Self-induced emf is the e.m.f induced in the coil due to the change of flux produced by linking it with its own turns. Mutual induced emf: The emf induced in a coil due to the change of flux produced by another neighbouring coil linking to it, is called Mutually Induced emf.   

Define ferromagnetic and ferrimagnetic materials.

Description : Define ferromagnetic and ferrimagnetic materials.

Last Answer : Ferromagnetic materials: The materials which possess magnetism in the absence of applied magnetic field is known as ferromagnetic materials. Example: iron, nickel, cobalt Ferrimagnetic ... a spontaneous magnetization. Example: Magnetite, Ferrous ferrite, Nickel ferrite, Manganese ferrite.

Define active and passive network.

Description : Define active and passive network. 

Last Answer : Active network :If a network consists of an energy source, then it is called as an active network. The type of energy source can be voltage source or a current source.  Passive network : If a network does not contain any energy source then it is called as the passive network. 

Define with respect to FET:- (i) Static drain resistance (ii) Dynamic resistance (iii) Trans conductance (iv) Pinch-off voltage

Description : Define with respect to FET:- (i) Static drain resistance (ii) Dynamic resistance (iii) Trans conductance (iv) Pinch-off voltage

Last Answer : (i) Static drain resistance- It is the ratio of drain source voltage (ΔVDS) to the drain current (ID) at constant gate-source voltage. It can be expressed as, Rd = (VDS)/(ID) at ... of charge carrier and the value of drain current reaches its constant saturation value is called pinch off voltage.

Draw construction of PVC gang capacitor and describe it’s working.

Description : Draw construction of PVC gang capacitor and describe it’s working.

Last Answer :  Diagram Working  In plastic core capacitor, poly-vinyl chloride (PVC) type of plastic film is used as dielectric between the fixed & movable vanes instead of air. This increases ... & results in great reduction of size of capacitor in comparison with the air core capacitor.

Describe construction of Aluminium Electrolytic capacitor.

Description : Describe construction of Aluminium Electrolytic capacitor.

Last Answer : A plain foil dry electrolytic capacitor is made by forming a coating of aluminium oxide on both sides of an aluminium foil. Two strips of aluminium foil used are then separated by two layers of porous ... is rolled up the ends closed with wax and then sealed into an aluminium container.