Can you help by answering this question?

Application of Norton's theorem to a circuit yields :

Recent questions and answers in Power Electronics

2 answers 223 views

In a thyristor D.C. chopper, which type of commutation results in best performance ?

answered Sep 30, 2018 in Power Electronics
2 answers 233 views

write short notes on BH curve.

answered Sep 4, 2018 in Power Electronics
2 answers 138 views

Compare BJT, MOSFET and IGBT .

answered Aug 28, 2018 in Power Electronics
2 answers 150 views

What is the meaning of RMS value?

answered Aug 7, 2018 in Power Electronics
17 answers 554 views

Which device use to convert DC to AC?

answered Jul 29, 2018 in Power Electronics
2 answers 12 views

The disadvantage of voltage divider bias is that  1. it has a high stability factor 2. it has many resistors 3. it allows thermal runaway 4. it does not allow faithful amplification

answered Jul 23, 2018 in Power Electronics
1 answer 79 views

What is meant by firing angle of thyristor?

answered Jul 1, 2018 in Thyristor
1 answer 53 views

Is a SCR a thyristor?

answered Jun 25, 2018 in Thyristor
1 answer 133 views

Is gate turn on mechanism of GTO is similar to conventional thyristor?

answered Jun 22, 2018 in GTO
0 answers 94 views

The SCR would be turned OFF by voltage reversal of applied anode-cathode ac supply frequency of A) 10 kHz B) 10 Hz C) 5 kHz D) 5 Hz 

asked Jun 18, 2018 in Power Electronics
1 answer 55 views

Which of the following thyristors can be used for high frequency of operation? A) TRIAC B) DIAC C) SCR D) GTO 

answered Jun 18, 2018 in Thyristor
1 answer 38 views

How is the GTO turned off? A) By using a commutation circuit B) By applying reverse gate pulse C) By using a latch-up circuit D) By reverse anode current pulse 

answered Jun 18, 2018 in GTO
1 answer 16 views

Natural commutation means: A) reducing the thyristor current to zero B) reducing the thyristor current below “holding current” C) reducing the current to zero and allowing time to recover thyristor junctions D) none of (A), (B) and (C)

answered Jun 17, 2018 in Power Electronics
1 answer 23 views

The current gain of emitter follower is: A) less than one B) more than one C) zero D) unpredictable

answered Jun 17, 2018 in Power Electronics
1 answer 21 views

If the input to a differentiating circuit is a saw-tooth wave, then output will be …………….. wave: A) square B) rectangular wave C) triangular wave D) rectified sine wave

answered Jun 17, 2018 in Power Electronics
0 answers 14 views

The power loss in a transistor is a function of the product of (A) base current and collector-emitter voltage (B) collector current and base current (C) collector current and saturation voltage (D) collector current and collector-emitter voltage 

asked Jun 4, 2018 in Power Electronics
0 answers 16 views

A TRIAC can be switched into on-state by (A) positive gate current only (B) negative gate current only (C) positive or negative gate current (D) sinusoidal gate current  

asked Jun 4, 2018 in Power Electronics
0 answers 13 views

The conducting SCR turns-off when the on-state current is (A) below the latching current (B) below the holding current (C) equal to the reverse leakage current (D) zero 

asked Jun 4, 2018 in Power Electronics
0 answers 20 views

The duty ratio of a step-up chopper with an output voltage of 200 V from a 80 V dc source, is (A) 0.4 (B) 0.5 (C ) 0.6 (D) 1.5 

asked Jun 4, 2018 in Power Electronics
7 answers 1,161 views

Draw the structural diagram of GTO. Explain briefly the switching behavior of GTO with the help of appropriate voltage and current waveform.

answered Jun 3, 2018 in Unit 1
1 answer 40 views

Power Semiconductor device - history

answered May 27, 2018 in Power Electronics
1 answer 46 views

How is Power electronics distinct from linear electronics?

answered May 27, 2018 in Power Electronics
1 answer 18 views

Power Semiconductor Devices by Version 2 EE IIT, Kharagpur 

answered May 27, 2018 in Power Electronics
0 answers 44 views

A thyristor is triggered by a pulse train of 5 kHz. The duty ratio is 0.4. If the allowable average power is 100 W, the maximum allowable gate drive power will be 

asked May 25, 2018 in Power Electronics
1 answer 14 views

Consider the following statements with regard to inverters 1. Line commutated inverters can function as isolated ac sources 2. Force commutated inverters can provide independent ac voltage with adjustable voltage and frequency 3. Thyrister based inverters do not require additional circuitry for commutation 4. IGBT, PMOSFET based inverters are more reliable, less costly and less complex. The correct statements are A)1,3 B)1,3,4 C) 2,4 D) 1,4

answered May 24, 2018 in Power Electronics
1 answer 19 views

TRIAC is an ac switch which can be made to conduct on

answered May 23, 2018 in Power Electronics
3 answers 120 views

What is the difference between forward and reverse bias?

answered May 23, 2018 in Power Electronics
3 answers 70 views

What is the ripple voltage?

answered May 23, 2018 in Power Electronics
1 answer 7 views

In a thyristor, the magnitude of anode current will:

answered May 22, 2018 in Power Electronics
1 answer 14 views

Turn on time of an SCR can be reduced by using a:

answered May 22, 2018 in Power Electronics
1 answer 18 views

During forward blocking state, the SCR has:

answered May 22, 2018 in Power Electronics
1 answer 8 views

Triac are usually operated at:

answered May 22, 2018 in Power Electronics
1 answer 10 views

A series inductor is normally added in a thyrister circuit for achieving protection against:

answered May 22, 2018 in Power Electronics
2 answers 18 views

What is Baud ?

answered May 22, 2018 in Power Electronics
2 answers 44 views

What is Coulomb's law ?

answered May 22, 2018 in Power Electronics
3 answers 43 views

What is Cathode ray tube ?

answered May 22, 2018 in Power Electronics
2 answers 28 views

write short notes on thyristor CSI .

answered May 22, 2018 in Power Electronics
2 answers 201 views

what are the disadvantages of thyristor?

answered May 22, 2018 in Power Electronics
2 answers 26 views

what is firing angle?

answered May 22, 2018 in Power Electronics
2 answers 46 views

Do Zener diodes have polarity?

answered May 20, 2018 in Power Electronics
1 answer 21 views

The output voltage V0 ofthe Schmitt trigger shown in figure swings between +15V and —1 5V. Assume that the operational amplifier is ideal. The output will change from +1 5 V to -1 5V when the instantaneous value of the input sine wave is  A) 5 V in the positive slope only B) 5 V in the negative slope only C) Vin the positive and negative slopes D) 3 V in the positive and negative slopes

answered May 20, 2018 in Power Electronics
1 answer 12 views

A thyristor (SCR) turns off when the  A) Gate pulse is removed B) Gate pulse is applied C) Thyristor current is below holding value D) Anode voltage is made negative

answered May 20, 2018 in Power Electronics
1 answer 20 views

Turn-on of a thyristor (SCR) takes place when  A) Anode to cathode voltage is positive B) Anode to cathode voltage is negative C) Positive current is applied to gate D) Anode to cathode voltage is positive and positive current pulse is applied to gate

answered May 20, 2018 in Power Electronics
1 answer 12 views

A triac is a device which acts as a  A) Diode in forward direction and thrylistor in the reverse direction B) Thyristor in both directions C) Diode in both directions D) Thyristor in forward direction and diode in reverse direction

answered May 20, 2018 in Power Electronics
1 answer 14 views

A GTOSCR  A) Requires a special turn-off circuit like the communication circuit of a thyristor (SCR) B) Can be turned off by removing the gate pulse C) Can be turned off by giving a negative pulse to the gate D) Can be turned off by giving a positive gate pulse to the gate

answered May 20, 2018 in Power Electronics
1 answer 16 views

Which power device of the following is not a current triggered device?  A) Thyristor B) GTO C) TRIAC D) MOSFET

answered May 20, 2018 in Power Electronics
1 answer 6 views

The number of p-n junctions in a thyristor are  A)1 B) 2 C) 3 D) 4

asked May 20, 2018 in Power Electronics
1 answer 23 views

A single phase fully controlled bridge converter supplies a load drawing constant and ripple free load current, if the triggering angle is 30o, the input power factor will be  (A) 0.65 (B) 0.78 (C) 0.85 (D) 0.866

asked May 18, 2018 in Power Electronics
1 answer 21 views

A 3-phase voltage source inverter is operated in 180o conduction mode. Which one of the following statements is true ?  (A) Both pole-voltage and line-voltage will have 3rd harmonic components (B) Pole-voltage will have 3rd harmonic component but line-voltage will be free from 3rd harmonic (C) Line-voltage will have 3rd harmonic component but pole-voltage will be free from 3rd harmonic (D) Both pole-voltage and line-voltage will be free from 3rd harmonic components

asked May 18, 2018 in Power Electronics
To see more, click for all the questions in this category.

Welcome to electronics2electrical.com here you can ask questions related to electrical, electronics, mechanical, telecommunication, instrumentation, computer, mathematics, physics etc.
Be respectful to all the members. Do not copy and paste the answers from other websites which have copyright content. While asking question give full details about it.

Categories

Most popular tags

power motor dc circuit transformer voltage current used system phase resistance factor synchronous load ac energy induction electric generator series frequency between speed capacitor use electrical meter line difference control type mosfet transmission magnetic plant high single instrument bjt unit source advantages function diode and machine winding field define torque parallel amplifier supply shunt thyristor motors electricity arduino maximum time relay armature problem value on transformers types coil diagram state flow ratio material three formula starting direction theorem method emf operating efficiency digital wave microprocessor test instruments inductance loss measure operation connected signal low applications effect single-phase network temperature working constant losses different law wattmeter measuring compare controlled breaker drive device logic rc full switch flux wire resistivity disadvantages free of materials machines angle force converter conductor transistor gain open protection scr core measurement number bridge principle generators reactance circuits negative the friction iron loop short pole battery conservation steam resistors hysteresis computer using analog lines secondary station gate a rectifier inverter linear induced relays nuclear capacitance basic characteristics design direct work rotor electronics ammeter forces diesel damping rlc connection factors capacitors minimum insulation moving regulation running self systems air fault range main stability quality starter igbt eddy alternator ideal rl average 3-phase plants arc thermal error fuzzy biasing dielectric pressure balanced superposition errors copper rotation feedback impedance measured electronic electrons charge inductive transfer explain start off back curve over solar is three-phase tariff locomotive peak bias zener engineering commutator surge conductors rating universal potentiometer density permanent mechanical transducer capacity memory adc excitation two fuse pure harmonics application semiconductor inductor internal pmmc reaction welding resonance traction permeability breakers rms designed electromagnetic si generation brushes switching capacitive shaded rate 1 distribution resistor methods delta star oscillator reluctance simplification algebra 8085 boolean weston dynamometer insulating strength installation definition fuel heating earth units

8,450 questions

7,047 answers

132 comments

3,085 users

...