x

What is the principle of DC generator?

What is the principle of DC generator?

81 views

asked Mar 15, 2018 by anonymous

1 Answer

Answer :

principle

answered Nov 10, 2021 by aditya2321

Please log in or register to answer this question.

Related Questions

A 200 V DC machine supplies 20 A at 200 V as a generator. The armature resistance is 0.2

A 200 V DC machine supplies 20 A at 200 V as a generator. The armature resistance is 0.2 Ohm. If the machine is now operated as a motor at same terminal voltage and current but with the flux increased by 10%, the ratio of motor speed to generator speed is
Last Answer : A 200 V DC machine supplies 20 A at 200 V as a generator. The armature resistance is 0.2 Ohm. If the machine is now operated as a motor at same terminal voltage and current but with the flux increased by 10%, the ratio of motor speed to generator speed is 0.87

127 views 1 answer

asked May 8, 2018 by anonymous

The fall in speed of a dc generator due to increase in load can be corrected by

The fall in speed of a dc generator due to increase in load can be corrected by (1) cooling the armature.. (2) increasing the excitation. (3) reducing the load voltage. (4) increasing the input to the prime mover
Last Answer : It can be corrected by increasing the input to the prime mover.

364 views 2 answers

asked May 1, 2018 by anonymous

In a DC generator the windings of interpoles are connected :

In a DC generator the windings of interpoles are connected : (A) in series with main field winding, to create a pole,of same polarity as the main pole ahead in the direction of rotation. ... winding, to create a pole of opposite polarity as the main pole ahead in the direction of rotation.
Last Answer : In a DC generator the windings of interpoles are connected : in series with the armature winding, to create a pole of same polarity as the main pole ahead in the direction of rotation.

126 views 1 answer

asked Apr 29, 2018 by anonymous

What is the difference between an AC and DC generator?

What is the difference between an AC and DC generator?
Last Answer : The generator which generates DC voltage is called DC generator and generator which generates AC voltage is called AC generator (or) Alternator. In DC generator armature is rotated and field winding ... generator. A DC generator can generate low voltages but an AC generator can generate upto 11kv.

317 views 1 answer

asked Mar 15, 2018 by anonymous

From which material field coils of DC generator are made of?

From which material field coils of DC generator are made of?
Last Answer : Field coils of DC generator are usually made of copper.

118 views 1 answer

asked Mar 3, 2018 by anonymous

Why is the armature of DC generator laminated?

Why is the armature of DC generator laminated?
Last Answer : The armature of DC generator is laminated to reduce eddy current losses.

176 views 1 answer

asked Mar 3, 2018 by anonymous

What is the principle of DC motor?

What is the principle of DC motor?
Last Answer : principle

97 views 1 answer

asked Mar 15, 2018 by anonymous

State the function of commutator in DC generator and name the material used for commutator.

State the function of commutator in DC generator and name the material used for commutator.
Last Answer : Function of Commutator: Commutator converts AC induced in armature winding into DC for external load. Material: i) Commutator segments are made up of Copper. ii) Commutator segments are insulated from each other by Mica.

259 views 1 answer

asked Jul 27, 2019 by anonymous

The eddy current loss in a dc generator is 400 W at 40 Hz frequency of reversal and constant flux density.

The eddy current loss in a dc generator is 400 W at 40 Hz frequency of reversal and constant flux density. When frequency is increased to 50 Hz., eddy current loss is : (A) 256 W (B) 320 W (C) 500 W (D) 625 W
Last Answer : The eddy current loss in a dc generator is 400 W at 40 Hz frequency of reversal and constant flux density. When frequency is increased to 50 Hz., eddy current loss is : 625 W

105 views 1 answer

asked Apr 30, 2018 by anonymous

The terminal characteristics of a dc generator suitable for electric welders is

The terminal characteristics of a dc generator suitable for electric welders is (A) separately excited generator (B) shunt generator (C) series generator (D) differentially compounded generator
Last Answer : The terminal characteristics of a dc generator suitable for electric welders is differentially compounded generator

105 views 1 answer

asked Apr 28, 2018 by anonymous

The critical resistance of the D.C. generator is the resistance of?

Last Answer : The critical resistance of the D.C. generator is the resistance of field.

558 views 1 answer

asked Mar 21, 2018 by anonymous

If residual magnetism is present in a D.C. generator, the induced e.m.f. at zero speed will be?

If residual magnetism is present in a D.C. generator, the induced e.m.f. at zero speed will be?
Last Answer : If residual magnetism is present in a D.C. generator, the induced e.m.f. at zero speed will be zero.

278 views 1 answer

asked Mar 21, 2018 by anonymous

A 220 V D.C. generator is run at full speed without any excitation. The open circuit voltage will be?

Last Answer : A 220 V D.C. generator is run at full speed without any excitation. The open circuit voltage will be about 2 V.

486 views 1 answer

asked Mar 21, 2018 by anonymous

In a level compounded D.C. generator, full load terminal voltage is?

Last Answer : In a level compounded D.C. generator, full load terminal voltage is equal to no-load terminal voltage.

130 views 1 answer

asked Mar 21, 2018 by anonymous

In a D.C. generator in case the resistance of the field winding is increased, then output voltage will?

Last Answer : In a D.C. generator in case the resistance of the field winding is increased, then output voltage will decrease.

253 views 1 answer

asked Mar 21, 2018 by anonymous

A D.C. generator can be considered as?

Last Answer : A D.C. generator can be considered as rotating amplifier.

76 views 1 answer

asked Mar 21, 2018 by anonymous

In a D.C. generator the critical resistance refers to the resistance of?

Last Answer : In a D.C. generator, the critical resistance refers to the resistance of field.

137 views 1 answer

asked Mar 21, 2018 by anonymous

Flashing the field of D.C. generator means?

Last Answer : Flashing the field of D.C. generator means creating residual magnetism by a D.C. source.

96 views 1 answer

asked Mar 21, 2018 by anonymous

If a D.C. generator fails to build up the probable cause could not be?

Last Answer : If a D.C. generator fails to build up the probable cause could not be field resistance less than the critical resistance.

130 views 1 answer

asked Mar 21, 2018 by anonymous

In a D.C. generator the magnetic neutral axis coincides with the geometrical neutral axis, when?

Last Answer : In a D.C. generator the magnetic neutral axis coincides with the geometrical neutral axis, when there is no load on|he generator.

227 views 1 answer

asked Mar 21, 2018 by anonymous

The e.m.f. generated in a D.C. generator is directly proportional to?

Last Answer : The e.m.f. generated in a D.C. generator is directly proportional to speed of armature.

610 views 1 answer

asked Mar 21, 2018 by anonymous

In a D.C. generator the number of mechanical degrees and electrical degrees will be the same when?

Last Answer : In a D.C. generator the number of mechanical degrees and electrical degrees will be the same when number of poles is 2.

787 views 1 answer

asked Mar 20, 2018 by anonymous

D.C. generator generally preferred for charging automobile batteries is?

Last Answer : D.C. generator generally preferred for charging automobile batteries is long shunt compound generator.

240 views 1 answer

asked Mar 20, 2018 by anonymous

The armature core of a D.C. generator is usually made of?

Last Answer : The armature core of a D.C. generator is usually made of silicon steel.

154 views 1 answer

asked Mar 20, 2018 by anonymous

In a D.C. generator the actual flux distribution depends upon?

91 views 0 answers

asked Mar 20, 2018 by anonymous

In a D.C. generator the ripples in the direct e.m.f. generated are reduced by?

Last Answer : In a D.C. generator the ripples in the direct e.m.f. generated are reduced by using carbon brushes of superior quality.

228 views 1 answer

asked Mar 20, 2018 by anonymous

Magnetic field in a D.C. generator is produced by?

Last Answer : ni bondha

442 views 2 answers

asked Mar 20, 2018 by anonymous

The demagnetising component of armature reaction in a D.C. generator?

Last Answer : The demagnetising component of armature reaction in a D.C. generator reduces generator e.m.f.

124 views 1 answer

asked Mar 20, 2018 by anonymous

If brushes of a D.C. generator are moved in order to bring these brushes in magnetic neutral axis, there will be?

Last Answer : If brushes of a D.C. generator are moved in order to bring these brushes in magnetic neutral axis, there will be crossmagnetisation as well as demagnetising.

152 views 1 answer

asked Mar 20, 2018 by anonymous

In case of a 4-pole D.C. generator provided with a two layer lap winding with sixteen coils, the pole pitch will be?

Last Answer : In case of a 4-pole D.C. generator provided with a two layer lap winding with sixteen coils, the pole pitch will be 8.

262 views 1 answer

asked Mar 20, 2018 by anonymous

For a D.C. generator when the number of poles and the number of armature conductors is fixed...

For a D.C. generator when the number of poles and the number of armature conductors is fixed, then which winding will give the higher e.m.f. ?
Last Answer : Wave winding

144 views 1 answer

asked Mar 20, 2018 by anonymous

The armature of D.C. generator is laminated to

205 views 0 answers

asked Mar 20, 2018 by anonymous

In a D.C. generator, the iron losses mainly take place in?

Last Answer : In a D.C. generator, the iron losses mainly take place in armature rotor.

273 views 1 answer

asked Mar 20, 2018 by anonymous

The condition for maximum efficiency for a D.C. generator is?

Last Answer : The condition for maximum efficiency for a D.C. generator is variable losses equal to constant losses.

238 views 1 answer

asked Mar 20, 2018 by anonymous

The total losses in a well designed D.C. generator of 10 kW will be nearly?

Last Answer : The total losses in a well designed D.C. generator of 10 kW will be nearly 500 W.

140 views 1 answer

asked Mar 20, 2018 by anonymous

What is the principle of synchronous motor?

What is the principle of synchronous motor?

74 views 0 answers

asked Mar 15, 2018 by anonymous

What is the principle of AC motor?

What is the principle of AC motor?

68 views 0 answers

asked Mar 15, 2018 by anonymous

In D.C. generators on no-load, the air gap flux distribution in space is?

Last Answer : In D.C. generators on no-load, the air gap flux distribution in space is flat topped.

145 views 1 answer

asked Mar 21, 2018 by anonymous

Describe the working principle of photoelectric pickup type tacho-generator.

Describe the working principle of photoelectric pickup type tacho-generator.
Last Answer : Working: Working principle: The light passes through the holes available on the rotating disc with a specific interval, depends on the angular speed of disc having equidistant holes. The frequency of this light pulses ... by N=f/HS N=speed f=frequency Hs=holes on the disc

537 views 1 answer

asked Aug 5, 2019 by anonymous

A _________ is used to measure the stator % winding temperature of the generator.

A _________ is used to measure the stator % winding temperature of the generator. (A) Thermocouple (B) Pyrometer (C) Resistance thermometer (D) Thermometer
Last Answer : A Resistance thermometer is used to measure the stator % winding temperature of the generator.

3.4k views 1 answer

asked May 8, 2018 by anonymous

In a synchronous generator if the excitation increased from a low value to normal value, with a fixed load

In a synchronous generator if the excitation increased from a low value to normal value, with a fixed load (A) The armature current increases and the power factor decreases (B) The armature ... but is lagging (D) The armature current decreases and the power factor increases and is leading
Last Answer : In a synchronous generator if the excitation increased from a low value to normal value, with a fixed load The armature current decreases and the power factor increases and is leading

130 views 1 answer

asked Apr 29, 2018 by anonymous

In a synchronous generator delivering lagging power factor load

In a synchronous generator delivering lagging power factor load (1) the excitation emf leads terminal voltage by the power angle (2) the excitation emf lags terminal voltage by the power angle (3) ... by the power factor angle (4) excitation emf lags the terminal voltage by the power factor angle
Last Answer : In a synchronous generator delivering lagging power factor load the excitation emf leads terminal voltage by the power angle

343 views 1 answer

asked Apr 29, 2018 by anonymous

The armature reaction in a synchronous generator supplying leading power factor load is

The armature reaction in a synchronous generator supplying leading power factor load is (A) magnetizing (B) demagnetizing (C) demagnetizing and cross-magnetizing (D) magnetizing and cross-magnetizing
Last Answer : The armature reaction in a synchronous generator supplying leading power factor load is magnetizing and cross-magnetizing

99 views 1 answer

asked Apr 28, 2018 by anonymous

What is the difference between synchronous and asynchronous generator?

What is the difference between synchronous and asynchronous generator?

150 views 0 answers

asked Mar 15, 2018 by anonymous

What are the main parts of a generator?

What are the main parts of a generator?
Last Answer : the main parts of the generator are as follows yoke Armature Poles field winding Prime mover Commutator Shaft Bearings Brushes

87 views 1 answer

asked Dec 16, 2017 by anonymous

can induction motor be used as generator?

Last Answer : if induction motor rotates exceed than its synchronous speed, it acts as a generator.

68 views 1 answer

asked Sep 9, 2017 by anonymous

Why have both principle and principal when they can both be used interchangeably?

Why have both principle and principal when they can both be used interchangeably?
Last Answer : Can they be used interchangeably? Correct me if I'm wrong, but I thought they had distinct meanings. Prinicpal being the leader of a school, or the original money down on a payment, or a sort-of ... a scientific law (and both probably having more meanings that I didn't think of). Am I mistaken?

1 view 1 answer

asked Feb 27 by anonymous

State working principle of alternator. State the meaning self and separate excitation.

State working principle of alternator. State the meaning self and separate excitation.
Last Answer : Working principle of alternator: When a conductor is moved in magnetic field or a magnetic field moved with respect to conductor, according to Faraday's law of electromagnetic induction, the conductor ... like battery or shaft-mounted exciter, then the excitation is said to be separate excitation.

182 views 1 answer

asked May 27, 2020 by anonymous

Explain the working principle of induction motor.

Explain the working principle of induction motor.
Last Answer : Working principle of induction motor: * When the motor is excited with three-phase supply, three-phase stator winding carries three-phase currents & produces a rotating magnetic field of constant magnitude and ... , which tend to move the rotor in the same direction as the rotating magnetic field.

606 views 1 answer

asked May 22, 2020 by anonymous

Explain with neat sketch the working principle of MIG.

Explain with neat sketch the working principle of MIG.
Last Answer : In metal-arc inert gas welding the Weld area is shielded by an effectively inert atmosphere of argon, helium, carbon dioxide, or various other gas mixtures . The consumable bare Wire is fed automatically ... of the molten-weld puddle. Multiple-weld layers can be deposited at the joint.

146 views 1 answer

asked May 7, 2020 by anonymous

Show More ⇦ Previous Next ⇨