SCR can act as _______ controlled rectifier.

SCR can act as _______ controlled rectifier. A. phase B. frequency C. amplitude D. power  
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Answer :

SCR can act as phase controlled rectifier.

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Related questions

A silicon controlled rectifier (SCR) is a solid state device used to change ________________. A. DC to AC and control relatively low load current B. AC to DC and control relatively high load current C. DC to AC and control relatively high load current D. AC to DC and control relatively low load current

Description : A silicon controlled rectifier (SCR) is a solid state device used to change ________________. A. DC to AC and control relatively low load current B. AC to DC and control relatively high load ... to AC and control relatively high load current D. AC to DC and control relatively low load current

Last Answer : Answer: B

Since the characteristics of the device shown in figure 'A' of the illustration includes a stable voltage and low current while operating, it can be suitably used in _____________. EL-0065 A. oscillators and SCR trigger circuits B. class A and B amplifiers C. generator rectifier and filtering supplies D. all of the above

Description : Since the characteristics of the device shown in figure 'A' of the illustration includes a stable voltage and low current while operating, it can be suitably used in _____________. EL-0065 A. oscillators ... . class A and B amplifiers C. generator rectifier and filtering supplies D. all of the above

Last Answer : Answer: A

A 230 V, 50 Hz phase controlled single-phase full-controlled SCR bridge converter draws 15 A constant dc

Description : A 230 V, 50 Hz phase controlled single-phase full-controlled SCR bridge converter draws 15 A constant dc current. If the source inductance is 3 mH, the drop in dc output voltage is (A) 4.5 V (B) 6.75 V (C) 9 V (D) 13.5 V

Last Answer : A 230 V, 50 Hz phase controlled single-phase full-controlled SCR bridge converter draws 15 A constant dc current. If the source inductance is 3 mH, the drop in dc output voltage is 9 V

The silicon -controlled rectifier can be turned off : -

Description :  The silicon -controlled rectifier can be turned off : -  a) by a negative gate pulse b) by forced commutation c) with the off switch d) when the breakover voltage is exceeded

Last Answer :  The silicon -controlled rectifier can be turned off : - by forced commutation

A single phase, half-wave, controlled rectifier has 400 sin (314 t) as the input voltage and R as the load...

Description : A single phase, half-wave, controlled rectifier has 400 sin (314 t) as the input voltage and R as the load. For a firing angle of 60° for the SCR, the average output voltage is   (a) 240/π (b) 400/π (c) 300/π (d) 200/π 

Last Answer : C

Figure 'B' shown in the illustration represents a/an ____________. EL-0067 A. silicon controlled rectifier B. junction field effect transistor C. diac thyristor D. IG MOS field effect transistor

Description : Figure 'B' shown in the illustration represents a/an ____________. EL-0067 A. silicon controlled rectifier B. junction field effect transistor C. diac thyristor D. IG MOS field effect transistor

Last Answer : Answer: A

Figure 'C' shown in the illustration represents a _________. EL-0078 A. silicon controlled rectifier B. light emitting diode C. photosensitive diode D. Zener diode

Description : Figure 'C' shown in the illustration represents a _________. EL-0078 A. silicon controlled rectifier B. light emitting diode C. photosensitive diode D. Zener diode

Last Answer : Answer: C

Figure 'A' of the diagram shown in the illustration represents a/an ____________. EL-0078 A. silicon controlled rectifier B. IG or MOS field effect transistor C. triac thyristor D. junction field effect transistor

Description : Figure 'A' of the diagram shown in the illustration represents a/an ____________. EL-0078 A. silicon controlled rectifier B. IG or MOS field effect transistor C. triac thyristor D. junction field effect transistor

Last Answer : Answer: B

Figure 'D' shown in the illustration represents a _________. EL-0067 A. silicon controlled rectifier B. light emitting diode C. photosensitive diode D. Zener diode

Description : Figure 'D' shown in the illustration represents a _________. EL-0067 A. silicon controlled rectifier B. light emitting diode C. photosensitive diode D. Zener diode

Last Answer : Answer: B

Figure 'B' of the diagram shown in the illustration represents a/an ____________. EL-0065 A. silicon controlled rectifier B. junction field effect transistor C. diac thyristor D. IG or MOS field effect transistor

Description : Figure 'B' of the diagram shown in the illustration represents a/an ____________. EL-0065 A. silicon controlled rectifier B. junction field effect transistor C. diac thyristor D. IG or MOS field effect transistor

Last Answer : Answer: B

The symbol in figure 'A' shown in the illustration represents a ____________. EL-0065 A. diac B. field effect transistor C. silicon controlled rectifier D. unijunction transistor

Description : The symbol in figure 'A' shown in the illustration represents a ____________. EL-0065 A. diac B. field effect transistor C. silicon controlled rectifier D. unijunction transistor

Last Answer : Answer: D

Which of the following statements represents an application of a silicon controlled rectifier? A. To provide DC power for a main propulsion motor. B. For use as a voltage reference diode. C. For sensing flame in an automated burner. D. To eliminate power supply hum.

Description : Which of the following statements represents an application of a silicon controlled rectifier? A. To provide DC power for a main propulsion motor. B. For use as a voltage reference diode. C. For sensing flame in an automated burner. D. To eliminate power supply hum.

Last Answer : Answer: A

What are the advantages of freewheeling diodes in a controlled in a controlled rectifier?

Description : 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?

Description : 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 some of the applications of controlled rectifier.

Description : Mention some of the applications of controlled rectifier.

Last Answer : a. Steel rolling mills, printing press, textile mills and paper mills employing dc motor drives. b. DC traction c. Electro chemical and electro-metallurgical process d. Portable hand tool drives e. Magnet power supplies f. HVDC transmission system

What is meant by phase controlled rectifier?

Description : What is meant by phase controlled rectifier?

Last Answer : It converts fixed ac voltage into variable dc voltage.

What is delay angle or what is firing angle of phase controlled rectifier?

Description : What is delay angle or what is firing angle of phase controlled rectifier?

Last Answer : The delay angle is the angle at which thyristors are triggered after zero crossing. After zero crossing of supply voltage, one pair of thyristors is forward biased. After delay angle(α) these SCRs are triggered.

Single-phase mid-point controlled rectifier with RL load

Description : Single-phase mid-point controlled rectifier with RL load

Last Answer : Single-phase mid-point controlled rectifier with RL load : The circuit configuration of single-phase midpoint controlled rectifier is shown in the figure. During positive half-cycle of ... some part of next positive half-cycle of voltage with reversed polarity can appear across load.

Single-phase Midpoint controlled rectifier with Resistive load

Description : Single-phase Midpoint controlled rectifier with Resistive load

Last Answer : Single-phase Midpoint controlled rectifier with Resistive load:  1) During positive half cycle of AC supply, a is positive with respect to b , this makes T1 forward biased and T2 is reverse ... voltage reverses the polarity and T2 is turned off. The operation is as shown in waveforms.

In a three phase controlled bridge rectifier with an increase of overlap angles the output dc voltage

Description : In a three phase controlled bridge rectifier with an increase of overlap angles the output dc voltage

Last Answer : In a three phase controlled bridge rectifier with an increase of overlap angles the output dc voltage decreases

A single-phase half-controlled rectifier is driving a separately excited dc motor. The dc motor has a back emf

Description : A single-phase half-controlled rectifier is driving a separately excited dc motor. The dc motor has a back emf constant of 0.5 V/rpm. The armature current is 5 A without any ripple. The armature resistance is 2 Ohm. The ... of the motor will be  (A) 339 rpm (B) 359 rpm (C) 366 rpm (D) 386 rpm

Last Answer : 359

When the firing angle a of a single-phase, fully controlled rectifier feeding constant direct current into a

Description : When the firing angle a of a single-phase, fully controlled rectifier feeding constant direct current into a load is 30°, the displacement power factor of the rectifier is

Last Answer : When the firing angle a of a single-phase, fully controlled rectifier feeding constant direct current into a load is 30°, the displacement power factor of the rectifier is √3/2

The illustrated device is a _______. EL-0064 A. full wave bridge rectifier B. half wave bridge rectifier C. solid state voltage regulator D. direct current (DC) filter

Description : The illustrated device is a _______. EL-0064 A. full wave bridge rectifier B. half wave bridge rectifier C. solid state voltage regulator D. direct current (DC) filter

Last Answer : Answer: A

In the illustrated circuit, section II is considered to be a _______. EL-0085 A. full wave rectifier B. half wave rectifier C. quarter wave rectifier D. short wave rectifier

Description : In the illustrated circuit, section II is considered to be a _______. EL-0085 A. full wave rectifier B. half wave rectifier C. quarter wave rectifier D. short wave rectifier

Last Answer : Answer: A

The function of a rectifier is similar to that of a _______. A. trap B. regulating valve C. check valve D. filter

Description : The function of a rectifier is similar to that of a _______. A. trap B. regulating valve C. check valve D. filter

Last Answer : Answer: C

What is the difference between SCR and thyristor?

Description : What is the difference between SCR and thyristor?

Last Answer : SCR is a type of thyristor. Like GTO, IGCT, MCT, TRIAC, DIAC etc. are the types of thyristor.

The function of Snubber circuit connected across the SCR is to

Description : The function of Snubber circuit connected across the SCR is to (A) Suppress dv/dt (B) Increase dv/dt (C) Decrease dv/dt (D) Decrease di/dt

Last Answer : The function of snubber circuit across a SCR is to Reduce dv/dt 

Once SCR starts conducting a forward current, its gate losses control over

Description : Once SCR starts conducting a forward current, its gate losses control over (A) Anode circuit voltage only (B) Anode circuit current only (C) Anode circuit voltage and current (D) None of the above

Last Answer : Anode circuit voltage and current 

For an SCR with turn-on time of 5 microsecond, an ideal trigger pulse should have

Description : For an SCR with turn-on time of 5 microsecond, an ideal trigger pulse should have   (a) short rise time with pulse width = 3 µsec (b) long rise time with pulse width = 6 µsec (c) short rise time with pulse width = 6 µsec (d) None of the above 

Last Answer : a

For an SCR, di/dt protection is achieved through the use of

Last Answer : For an SCR, di/dt protection is achieved through the use of L in series with SCR.

For a diode to act as a rectifier, should it be connected in series or parallel with the load?

Description : For a diode to act as a rectifier, should it be connected in series or parallel with the load?

Last Answer : Series.

How do you convert Flash files to .SCR files on a Mac?

Description : How do you convert Flash files to .SCR files on a Mac?

Last Answer : answer:I don't know it it's even possible to do it. And I don't think there's any software that would meet your specifications; Mac software to convert Flash to .scr. .SCR files are ... 's a pretty good program for Windows called InstantStorm that's free and would do the conversion pretty easily.

Are there any other keyboard shortcuts to take screen shots other than Prt Scr.

Description : Are there any other keyboard shortcuts to take screen shots other than Prt Scr.

Last Answer : You can always download a screenshot utility. Most of those are either click-based or have assignable key commands.

What is an analogy for fly using spr str scr and thr?

Description : What is an analogy for fly using spr str scr and thr?

Last Answer : What is the answer ?

What are the different operation regions of the SCR?

Description : What are the different operation regions of the SCR?

Last Answer : SCR or thyristor will have three regions of operations based on the mode in which the device is connected in the circuit. Reverse blocking region: When the cathode of the thyristor is made positive with ... scr. Hence a gate signal is applied before the forward break over voltage to trigger the scr.

What are the advantages of GTO over SCR?

Description : What are the advantages of GTO over SCR?

Last Answer : a. Elimination of commutation of commutating components in forced commutation, resulting in reduction in cost, weight and volume. b. Reduction in acoustic noise and electromagnetic noise due to ... turn-off, permitting high switching frequencies. d. Improved efficiency of the converters.

What are the different turn on methods of SCR?

Description : What are the different turn on methods of SCR?

Last Answer : Forward voltage triggering Gate Triggering dv/dt triggering Temperature triggering Light triggering

What is latching current in SCR?

Description : What is latching current in SCR?

Last Answer : It is the minimum current required to latch(turn on) the SCR from forward blocking state to forward conduction state.

What is holding current in SCR?

Description : What is holding current in SCR?

Last Answer : When scr is conducting current in forward conduction state, scr will return to forward blocking state when the anode current or forward current falls below a low level called Holding current Note: ... the turn off process. In general holding current will be slightly lesser than the latching current.

What you mean by SCR?

Description : What you mean by SCR?  

Last Answer : SCR is meant for silicon controlled rectifier.  

what is the main application of scr in electronic field as well as in software field?

Description : what is the main application of scr in electronic field as well as in software field?

Last Answer : Ans- SCR is a rectifier we use this in power handling applications . By varying on time and off time of the scr i.e by giving the pulse to its gate we can vary the average output power ... part we can use micro controller and write a programme so that to generate required pulses to control the SCR.

Which is the most suitable power device for high frequency ( more 100 kHz) switching application? a) Power MOSFET b) BJT c) SCR d) UJT

Description : Which is the most suitable power device for high frequency ( more 100 kHz) switching application? a) Power MOSFET b) BJT c) SCR d) UJT

Last Answer : Ans: Power MOSFET

A modern power semiconductor device IGBT is combines the characteristics of a) BJT and MOSFET b) FCT and GTO c) SCR and MOSFET d) SCR and BJT

Description : A modern power semiconductor device IGBT is combines the characteristics of a) BJT and MOSFET b) FCT and GTO c) SCR and MOSFET d) SCR and BJT

Last Answer : Ans: BJT and MOSFET

What is the only way to cause an SCR to stop conducting?

Description : What is the only way to cause an SCR to stop conducting?

Last Answer : The forward bias must be reduced below the minimum conduction level.

When an SCR is forward biased, what is needed to cause it to conduct?

Description : When an SCR is forward biased, what is needed to cause it to conduct?

Last Answer : A gate signal.

The SCR is primarily used for what function?

Description : The SCR is primarily used for what function?

Last Answer : The SCR is primarily used for switching power on or off.

When testing an SCR with an ohmmeter, the SCR will conduct if what two elements are shorted together?

Description : When testing an SCR with an ohmmeter, the SCR will conduct if what two elements are shorted together?

Last Answer : Gate and anode.

What is a thyristor? What is an SCR?

Description : What is a thyristor? What is an SCR?

Last Answer : A thyristor is a solid-state semiconductor device with four layers of alternating N and P-type material. They act as bi stable switches, conducting when their gate receives a current trigger, and continue ... ) is a four-layer solid state device that controls current. It is a type of thyristor.

Purpose of Selective Catalytic Reduction (SCR)

Description : Purpose of Selective Catalytic Reduction (SCR)

Last Answer : Purpose of Selective Catalytic Reduction (SCR) : 1. It reduces Nox 75% to 90% 2. Converts it in to molecular nitrogen and water vapor 3. It reduces HC emission up to 80% 4. It reduces PM emission 20 to 25%.

Explain triggering of SCR using opto-coupler. State its advantages.

Description : Explain triggering of SCR using opto-coupler. State its advantages. 

Last Answer : Triggering of SCR using opto-coupler:  A simple opto-coupler based triggering circuit for SCR is shown in the figure. An optocoupler or opto-isolator is a combination of light source ... is small size and light weight device. iii)Interfacing with logic circuits is easily possible.