The diode oftenly used for voltage regulation in electronic circuits is

The diode oftenly used for voltage regulation in electronic circuits is (a) Zener (b) Varactor (c) Silicon (d) Germanium
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Answer :

The diode oftenly used for voltage regulation in electronic circuits is  Zener.

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Which of the following statements is true regarding the illustrated circuit? El-0069 A. This full wave bridge should never be used aboard ship because the ground on lead 'A' will show on the ship's ground detection system. B. Lead 'X' will always be positive (+) with respect to ground. C. This bridge circuit output will be direct current suitable for electronic circuits requiring voltage regulation. D. All the above are true.

Description : Which of the following statements is true regarding the illustrated circuit? El-0069 A. This full wave bridge should never be used aboard ship because the ground on lead 'A' will show on ... be direct current suitable for electronic circuits requiring voltage regulation. D. All the above are true.

Last Answer : Answer: B

A zener voltage regulator has load requirements of 12 V and 2 A. The zener diode minimum 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  

A diode in which the change in reverse bias voltage varies the capacitance is called as

Description : A diode in which the change in reverse bias voltage varies the capacitance is called as A) Varactor diode B) Switching diode C) Tunnel diode D) Zener-diode  

Last Answer : A diode in which the change in reverse bias voltage varies the capacitance is called as Varactor diode

The cut-in voltage of a silicon diode is approx.

Description : The cut-in voltage of a silicon diode is approx. • 0.7 volt • 0.3 volt • 1.4 volt • None of the above.

Last Answer : The cut-in voltage of a silicon diode is approx. 0.7 volt

What are the applications of diode ?

Description : What are the applications of diode ?

Last Answer : 1) Rectifier : - It is an electronics device used to convert AC to DC signal. The rectifier output is pulsating in nature their can be two types of rectifier. a) Half wave rectifier b) Full wave ... FWR are of two types : i) center tapped full wave rectifier ii) bridge type full wave rectifier

what is a diode

Description : if you got you will receive some cash

Last Answer : A diode is an electronic device which permits one directional flow of electric current.

The region consisting of holes and electrons near the p-n junction of a diode is

Description : The region consisting of holes and electrons near the p-n junction of a diode is (A) diffusion region (B) neutral zone (C) recombination region (D) depletion region 

Last Answer : The  region  consisting  of  holes  and  electrons  in a  pn  junction  is called  depletion layer.The  reason  being  both  holes  and  electrons have neutrolyzed at the  junction  thus  it  is depleated  with  delocalized  charge  carriers.

A power diode has lightly doped n type substrate sandwiched between heavily doped p and n regions

Description : A power diode has lightly doped n type substrate sandwiched between heavily doped p and n regions  (a) to increase reverse breakdown voltage (b) to reduce ohmic loss under forward bias (c) to decrease switching time of the power diode (d) to improve transient behaviour of the diode

Last Answer : A power diode has lightly doped n type substrate sandwiched between heavily doped p and n regions  to improve transient behaviour of the diode

The reverse breakdown phenomenon in a zener diode is known as

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

The arrow direction in the diode symbol indicates

Description : The arrow direction in the diode symbol indicates

Last Answer : Flow of current

When the diode is forward biased, it is equivalent to

Description : When the diode is forward biased, it is equivalent to

Last Answer : When the diode is forward biased, it is equivalent to An On switch

A forward potential of 10V is applied to a Si diode. A resistance of 1 KΩ is in series with the

Description : A forward potential of 10V is applied to a Si diode. A resistance of 1 KΩ is in series with the diode. The current through the diode is

Last Answer : A forward potential of 10V is applied to a Si diode. A resistance of 1 KΩ is in series with the diode. The current through the diode is 9.3 mA

The step Recovery Diode is used as

Description : The step Recovery Diode is used as • Frequency adder • Frequency subtractor • Frequency multiplier • None of the above.

Last Answer : The step Recovery Diode is used as Frequency multiplier

In a tunnel diode, electrons can tunnel through the P-N junction mainly because

Description : In a tunnel diode, electrons can tunnel through the P-N junction mainly because  1.impurity level is low 2.they have high energy 3.barrier potential is very low 4.depletion layer is extremely thin 

Last Answer : In a tunnel diode, electrons can tunnel through the P-N junction mainly because depletion layer is extremely thin 

In the illustration, the component labeled 'EXC' is _______. EL-0003 A. a separate class II regulated DC generator for critical direct current loads B. a generator feeding the FLD winding through the voltage regulator. C. the controller to drive the governor for turbogenerator speed. D. the electronic driver for the switchboard metering circuits

Description : In the illustration, the component labeled 'EXC' is _______. EL-0003 A. a separate class II regulated DC generator for critical direct current loads B. a generator feeding the FLD ... to drive the governor for turbogenerator speed. D. the electronic driver for the switchboard metering circuits

Last Answer : Answer: B

When troubleshooting most electronic circuits, 'loading effect' can be minimized by using a voltmeter with a/an ___________________. A. input impedance much greater than the impedance across which the voltage is being measured B. input impedance much less than the impedance across which the voltage is being measured C. sensitivity of less than 1000 ohms/volt D. sensitivity of more than 1000 volts/ohm

Description : When troubleshooting most electronic circuits, 'loading effect' can be minimized by using a voltmeter with a/an ___________________. A. input impedance much greater than the impedance across which the voltage ... sensitivity of less than 1000 ohms/volt D. sensitivity of more than 1000 volts/ohm

Last Answer : Answer: A

In the illustration, the diode between terminals 16 and 17 is to _________. EL-0046 A. insure that the voltage across the governor coil (EG-3P) never exceeds .6 VDC B. compensate for the temperature difference of the governor oil heating up C. protect the electronic governor from counter EMF D. act as a filter to prevent hunting

Description : In the illustration, the diode between terminals 16 and 17 is to _________. EL-0046 A. insure that the voltage across the governor coil (EG-3P) never exceeds .6 VDC B. compensate for the ... heating up C. protect the electronic governor from counter EMF D. act as a filter to prevent hunting

Last Answer : Answer: C

Can it help and oftenly be used?

Description : Can it help and oftenly be used?

Last Answer : A cheap and reliable home water filter brand that can be oftenly used would most likely be Brita. They have good water filters and you can buy one that even adds flavoring to the water as it exits the faucet.

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Description : Tomato is a _________ crop. a. Self pollinated b. Insect pollinated c. Oftenly cross pollinated d. Wind pollinated

Last Answer : Self pollinated

Nature of pollination in cucurbits is: a. Highly cross pollinated b. Oftenly cross pollinated c. Highly self pollinated d. None of above

Description : Nature of pollination in cucurbits is: a. Highly cross pollinated b. Oftenly cross pollinated c. Highly self pollinated d. None of above

Last Answer : Highly cross pollinated

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Last Answer : Highly cross pollinated

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Description : Electric circuits are protected against overloads and short circuits by means of a/an ______________. A. circuit breaker B. amplifier C. diode D. capacitor

Last Answer : Answer: A

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Description : Electrical circuits are protected against overheating by means of a/an ______________. A. circuit breaker B. amplifier C. diode D. capacitor

Last Answer : Answer: A

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Description : Device used to store energy in electrical circuits is A. resistor B. inductor C. capacitor D. diode

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Description : Name the two series circuits that exist in a diode circuit.

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Description : In electronic circuits, DC voltages can be positive (+) or negative (-) when measured with respect to the _________. A. printed circuit board 'common' trace B. chassis, console frame or hull 'ground' C. analogue or digital circuitry 'common' bus D. all of the above

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Last Answer : Answer: C

Claude Shannon described the operation of electronic switching circuits with a system of mathematical logic called _____________ a) LISP b) XLISP c) Neural networking d) Boolean algebra

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Last Answer : ANSWER: CARBON

In electronic circuits, what name is given to a frequency discriminating network designed to select or pass certain bands of frequencies with low attenuation and cause very high attenuation to other frequencies?

Description : In electronic circuits, what name is given to a frequency discriminating network designed to select or pass certain bands of frequencies with low attenuation and cause very high attenuation to other frequencies?

Last Answer : ANSWER: FILTER

State the need of tuned amplifier in electronic circuits.

Description : State the need of tuned amplifier in electronic circuits.

Last Answer : Necessity of tuned amplifier: 1. Selection of the desired radio frequency signal. 2. Amplification of the selected signal to a selected voltage level.

The light emitted diodes consist of:

Description : The light emitted diodes consist of: (1) Si (2) GaAs (3) Ge (4) Diamond 

Last Answer : The light emitted diodes consist of: GaAs 

In which of these is reverse recovery time nearly zero?

Description : In which of these is reverse recovery time nearly zero? (1) Zener diode (2) Tunnel diode (3) Schottky diode (4) PIN diode

Last Answer : In which of these is reverse recovery time nearly zero? (1) Zener diode (2) Tunnel diode (3) Schottky diode (4) PIN diode

Assume that D1 and D2 in figure are ideal diodes. The value of current I is

Description : Assume that D1 and D2 in figure are ideal diodes. The value of current I is A)0mA B) 0.25mA C) 0.5 mA D)1.0mA 

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Barrier potential in a P-N junction is caused by

Description : Barrier potential in a P-N junction is caused by   (A) thermally generated electrons and holes (B) diffusion of majority carriers across the junction (C) migration of minority carriers across the junction (D) flow of drift current.

Last Answer : Barrier potential in a P-N junction is caused by migration of minority carriers across the junction

Which of the following circuit elements is used to 'block' DC in an electronic circuit? (1) Resistances (2) Capacitance (3) Inductance (4) Diode

Description : Which of the following circuit elements is used to 'block' DC in an electronic circuit? (1) Resistances (2) Capacitance (3) Inductance (4) Diode

Last Answer : (2) Capacitance Explanation: A capacitor (originally known as condenser) is a passive two-terminal electrical component used to store energy in an electric field. Capacitors are widely used ... electric power transmission systems for stabilizing voltage and power flow, and for many other purposes.

Which of the devices listed is indicated by the electronic symbol lettered as 'A', shown in the illustration? EL-0016 A. Thyristor B. Diode C. Capacitor D. Transistor

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Which is the most important building block of electronic devices? (a) Diode (b) p-n junction (c) transistor (d) rectifier

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Which of the following circuit elements is used to ‘block’ DC in an electronic circuit ? (1) Resistances (2) Capacitance (3) Inductance (4) Diode

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Last Answer : Capacitance

What is Voltage Regulation ?

Description : What is Voltage Regulation ?

Last Answer : Answer : Voltage regulation is the difference between the voltage at the receiving end of a transmission line when it is unloaded and reloaded.

Why is it important to know voltage regulation ?

Description : Why is it important to know voltage regulation ?

Last Answer : Knowing the voltage regulation, the voltage at the load end can be kept within the specified range by the line voltage control devices.

A transformer has negative voltage regulation when its load power factor is- (a) Zero (b) Unity (c) Leading (d) Lagging

Description : A transformer has negative voltage regulation when its load power factor is- (a) Zero (b) Unity (c) Leading (d) Lagging

Last Answer : Ans: C

The instantaneous reduction in voltage of an AC generator, resulting from an increase in load, and prior to the automatic voltage regulator correcting the situation, is called voltage ____________. A. droop B. drop C. dip D. regulation

Description : The instantaneous reduction in voltage of an AC generator, resulting from an increase in load, and prior to the automatic voltage regulator correcting the situation, is called voltage ____________. A. droop B. drop C. dip D. regulation

Last Answer : Answer: C

A resistor placed in parallel to the output of a power supply _____________. A. is a temperature compensator B. corrects power factor C. prevents excessive currents D. aids in output voltage regulation

Description : A resistor placed in parallel to the output of a power supply _____________. A. is a temperature compensator B. corrects power factor C. prevents excessive currents D. aids in output voltage regulation

Last Answer : Answer: D

Autotransformer starters or compensators are sometimes used with polyphase induction motors to _____________. A. reduce the voltage applied to the motor during the starting period B. increase the voltage for 'across-the-line starting' C. provide a backup means of voltage regulation for emergency starting D. allow the voltage to be either stepped up or down, depending on the application, to ensure full torque

Description : Autotransformer starters or compensators are sometimes used with polyphase induction motors to _____________. A. reduce the voltage applied to the motor during the starting period B. increase the voltage for ' ... to be either stepped up or down, depending on the application, to ensure full torque

Last Answer : Answer: A

Why is the MMF method of estimating the voltage regulation considered as the optimistic method?

Description : Why is the MMF method of estimating the voltage regulation considered as the optimistic method?

Last Answer : In this method the actual value is more than the result obtained.