Description : What is a zener diode?
Last Answer : A zener diode is a special kind of diode which allows current to flow in the forward direction in the same manner as an ideal diode, but will also permit it to flow in the reverse direction when ... is above a certain value known as the breakdown voltage, "zener knee voltage" or "zener voltage."
Description : You have installed a Zener diode in parallel with a load. While measuring the voltage across the Zener diode it is found that it does not change as the current through the load increases. This means that the ... is working as it should B. is shorted C. is open D. does not regulate as it should
Last Answer : Answer: A
Description : The ___________ of a CRO controls the brightness of the spot formed on the screen a) Filament b) Grid c) Deflection plates d) Cathode
Last Answer : b) Grid
Description : An important part of inkjet printer is: (a) Deflection plates (b) Toner (c) Drum (d) None of these
Last Answer : (a) Deflection plates
Description : Explain with circuit diagram operation of zener diode as a voltage regulator.
Last Answer : The function of a regulator is to provide a constant output voltage to a load connected in parallel with it in spite of the ripples in the supply voltage or the variation in the load ... V0 = VZ is obtained across RL, whenever the input voltage remains within a minimum and maximum voltage.
Description : Which of the following is used for regulated electric supply? (1) Zener diode (2) Junction diode (3) Gun diode (4) Tunnel diode
Last Answer : (1) Zener diode Explanation: The Zener diode is like a generalpurpose signal diode. When based in the forward direction it behaves just like a normal signal diode, but when a reverse voltage ... property. Many diodes described as "Zener" diodes rely instead on avalanche breakdown as the mechanism.
Description : Which of the following is used for regulated electric supply ? (1) Zener diode (2) Junction diode (3) Gun diode (4) Tunnel diode
Last Answer : Zener diode
Description : What kind of voltage is applied to the horizontal deflection plates of the oscilloscope?
Last Answer : sweep voltage
Description : Why is electron flow with the arrow in the symbol of a Zener diode instead of against the arrow as it is in a normal diode?
Last Answer : Because Zener diodes are operated in the reverse bias mode.
Description : Forward current through a semi-conductor diode circuit is due to ________ (a) Minority carriers (b) majority carriers (c) holes (d) electrons
Last Answer : (b) majority carriers
Description : The output waveform produced due to time base generator in a CRO is a) saw tooth b) sinusoidal c) linear d) helical
Last Answer : a) saw tooth
Description : How does the temperature affect the Zener voltage of a Zener diode?
Last Answer : The Zener voltage of a Zener diode is affected by temperature changes. The Zener voltage of a diode is directly proportional to the temperature. This means that as the temperature increases, the ... is given by the Zener voltage temperature coefficient, which is specified in the diode's datasheet.
Description : In the illustration, the component VR2 on the A1 AMPLIFIER MODULE is _________. EL-0060 A. a zener diode to regulate the +9 volt power supply from common B. a variable resistor diode to control the output to terminal ... 2 at 9.1 volts DC D. a tunnel diode with a breakdown voltage of 6.6 Volts DC
Last Answer : Answer: C
Description : In the illustration, the component VR1 on the A1 AMPLIFIER MODULE is _________. EL-0060 A. a zener diode to regulate the +9 volt power supply from common B. a variable resistor diode to control the output to ... terminal 9 at 6.6 volts DC D. a tunnel diode with a breakdown voltage of 6.6 Volts DC
Description : In the illustration, the component VR1 on the A1A1 PCB is _________. EL-0060 A. a zener diode to regulate the +9 volt power supply B. a variable resistor diode to control the output to terminal 9 that controls ... terminal 9 at 6.6 volts DC D. a tunnel diode with a breakdown voltage of 6.6 Volts DC
Description : What Is Zener Diode? What Is Voltage Regulator?
Last Answer : The breakdown region of a p-n diode can be made very sharp and almost vertical diodes with almost vertical breakdown region are known a s zener diodes. A zener diode operating in the ... . Voltage regulator: The output remains constant despite changes in the input voltage due to zener effect.
Description : Hat Is Zener Diode? What Is Voltage Regulator?
Last Answer : The breakdown region of a p-n diode can be made very sharp and almost vertical diodes with almost vertical breakdown region are known a s zener diodes. A zener diode operating in the breakdown ... . It is this constant voltage that has made the zener diode an important device in voltage regulation.
Description : What is Zener Diode ? What is a voltage Regulator ?
Last Answer : The breakdown region of a p n diode can be made very sharp and almost vertical Diodes with almost vertical breakdown region are known as Zever Diodes. A Zener diodes operating in the breakdown ... VOLTAGE REGULATOR : The output remains constant despite changes in input voltage due to Zever effect.
Description : Explain Zener diode as voltage regulator.
Last Answer : Zener Diodes can be used to produce a stabilised voltage output with low ripple under varying load current conditions. By passing a small current through the diode from a voltage source, via a ... across the load in spite of variations in the input voltage or changes in the load current.
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
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
Last Answer : A Zener diode is operated in the Reverse bias around the knee of breakdown region mode as a voltage stabilizer.
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.
Description : The method used to produce electron emission in most vacuum tubes is known as ____________. A. photoelectric emission B. secondary electric emission C. cold cathodic electric emission D. thermionic emission
Last Answer : Answer: D
Description : The horizontal-deflection plates are used to produce what function?
Last Answer : Time and/or frequency relationships.
Description : Horizontal deflection plates of CRO are placed generally (a) Horizontal (b) Vertical (c) Diagonal (d) (a) or (b)
Last Answer : Horizontal
Description : The most common source of AC voltage is: a. motor b. generator c. cell d. transformer
Last Answer : c. cell
Description : What effect do longer deflection plates have on the electron beam?
Last Answer : A greater deflection angle.
Description : After a black out the emergency generator comes on; On restoring the main supply we are closing the circuit breaker of the main generator without bothering about synchronizing. How is this possible?
Last Answer : There is a power link connection breaker between the main generator and the emergency generator. During black out, this breaker trips. The emergency generator starts and its breaker closes and feeds only ... , there is no paralleling between main and emergency generator. Ask E/O for more details.
Description : In the illustration, the diode between terminals 16 and 17 is to _________. EL-0046 A. act as a short circuit for the sensing coil when CEMF is applied B. insure that the voltage across the coil does not exceed 9 volts C. improve response time D. act as a filter to prevent hunting
Description : The reverse breakdown phenomenon in a zener diode is known as
Last Answer : The reverse breakdown phenomenon in a zener diode is known as Avalanche effect
Description : An important port of a photocopier is: (a) Deflation plates (b) Toner (c) Charging electrode (d) Printed head
Last Answer : (b) Toner
Description : The current I passing through the galvanometer coil is related to the angle of deflection θ as a) I ∝ θ b) I 1/∝ θ c) I ∝ θ 2 d) I 1/∝ θ 2
Last Answer : a) I ∝ θ
Description : The deflection system of a TV picture tube makes use of a) magnetic deflection b) electric deflection c) Both (a) and (b) d) None of these
Last Answer : a) magnetic deflection
Description : A galvanometer of 65 Ω resistance gives full scale deflection with 4 mA current. In order to convert it into ammeter, the range of 10 A is connected with it, the shunt resistance should be a) 0.1 Ω b) 0.2 Ω c) 0.06 Ω d) 0.03 Ω
Last Answer : d) 0.03 Ω
Description : Refer to the circuit below. The voltage V2, is equal to:
Last Answer : The answer to this question is -3V. Because 3V is in parallel with v2 and voltages in parallel are equal. But it is in opposite direction so the answer is -3V.
Description : What is a diode?
Last Answer : In electronics, a diode is a two-terminal electronic component with asymmetric transfer characteristic, with low (ideally zero) resistance to current flow in one direction, and high (ideally ... a crystalline piece of semiconductor material with a p-n junction connected to two electrical terminals
Description : A device based on photo electric effect is called a) Photo sensitive b) Photo diode c) Photo synthesis d) Photo cell
Last Answer : d) Photo cell
Description : On increasing the reverse bias to a large value in a p-n junction diode current (a) Increases slowly (b) Remains fixed (c) Suddenly increases (d) Decreases slowly
Last Answer : (c) Suddenly increases
Description : In a semiconductor diode, p-side is earthed and to n-side is applied a potential of -2 volt; the diode shall (a) Conduct (b) Not conduct (c) Conduct partially (d) Break down
Last Answer : a) Conduct
Description : The reverse current through semiconductor diode is due to (a) Minority carrier (b) majority carrier (c) electrons (d) holes
Last Answer : (a) Minority carrier
Description : A light emitting diode emits light only when (a) Reversed biased (b) forward biased (c) unbiased (d) none
Last Answer : (b) forward biased
Description : Which is the most important building block of electronic devices? (a) Diode (b) p-n junction (c) transistor (d) rectifier
Last Answer : b) p-n junction
Description : A shunt generator develops stable output voltage if (A) magnetization characteristic is linear (B) magnetization characteristic is non-linear (C) the field winding resistance is more than the critical resistance (D) the residual magnetism is equal to zero
Last Answer : A shunt generator develops stable output voltage if magnetization characteristic is non-linear
Description : Explain Zener Diode.
Last Answer : A Zener diode is a type of semiconductor diode that is designed to operate in the reverse breakdown region of its characteristic curve. Unlike regular diodes, which are designed to conduct ... in surge protectors, power supplies, and other applications where precise voltage regulation is required.
Description : What is a Zener Diode ?
Last Answer : : Zener diode is a special type of diode.
Description : How depletion region get thin by increasing doping level in a zener diode?
Last Answer : Doping is a process of mixing sum impurity in a iinsulator andthen that acts like conductor...The materials which are said tobehave like this are called semi conductor . it is very often toknow ... theDepletion region remains there but it never ends....i-e depletionregion can not be removed finally
Description : For highly doped diode: a) Zener breakdown is likely to take place b) Avalanche breakdown is likely to take place c) Either (a) or (b) can take place d) Neither (a) nor (b) can take place
Last Answer : Ans: A
Description : In the electrical schematic, a Zener diode will be represented by which of the symbols shown in the illustration? EL-0067 A. A B. B C. C D. D