28 views
in DC generator by

1 Answer

0 votes
by

Iron losses in a D.C. machine are independent of variations in load.

Related questions

1 answer 66 views

In DC motor iron losses are occurred in?

asked Mar 26, 2018 in DC motor by Shimroz123
1 answer 27 views
1 answer 32 views

What is the percentage of stray losses in DC machine?

asked Mar 8, 2018 in Electronics Engineering by Quiz
1 answer 14 views
1 answer 17 views

In a dc machine, interpoles are used to  (1) neutralize the effect of armature reaction in the interpolar region (2) generate more induced emf in the armature (3) avoid interference of the armature flux with the main -field flux (4) reduce the demagnetizing effect of armature reaction

asked Apr 29, 2018 in Electrical Machine by Shimroz123
1 answer 16 views

The induced emf in the armature of a lap -wound four -pole dc machine having 100 armature conductors rotating at 600 rpm and with 1 Wb flux per pole is  (1) 1000V (2) 100V (3) 600V (4) 10,000V

asked Apr 29, 2018 in Electrical Machine by Shimroz123
1 answer 31 views

Brushes of DC machine are made up of ?

asked Mar 3, 2018 in Electrical Machine by Quiz
1 answer 17 views

The magnetic neutral plane shifts in a dc machine (A) in the direction of motion of motor (B) in the direction of motion of generator (C) due to increase in the field flux (D) cause reduction of flash over between commutator segments

asked Apr 28, 2018 in Electrical Engineering by Shimroz123
1 answer 30 views

Aluminium is not used as winding wire for the armature of a dc machine because  (1) aluminium has low resistivity (2) a large winding space is taken by aluminium conductors and creates jointing problems (3) the thermal conductivity of aluminium is low (4) aluminium has low conductivity as compared to copper

asked Apr 29, 2018 in Electrical Machine by Shimroz123
1 answer 15 views

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

asked May 8, 2018 in Electrical Machine by Shimroz123
1 answer 32 views

A 36 slot, 4 -pole, dc machine has a simplex lap winding with two conductors per slot. The back pitch and front pitch adopted could be respectively

asked May 3, 2018 in Electrical Machine by Shimroz123
1 answer 15 views

In a given transformer for a given applied voltage, losses which remain constant irrespective of load changes are?

asked Mar 19, 2018 in Transformer by Shimroz123
1 answer 41 views

At full -load of a transformer, the iron loss and copper loss are 3000 W and 4000 W respectively. Then total loss at maximum efficiency is :  (A) 7000 W (B) 6000 W (C) 8000 W (D) 4000 W

asked Apr 30, 2018 in Electrical Engineering by Shimroz123
0 answers 14 views

What are the losses in a transmission line?

asked Mar 10, 2018 in High voltage engineering by Quiz
1 answer 48 views

What are the types of power losses in inductor?

asked Mar 8, 2018 in Electronics Engineering by Quiz
1 answer 78 views

The friction losses in Real Transformers are :  (A) 0% (B) 5% (C) 25% (D) 50%

asked May 8, 2018 in Electrical Engineering by Shimroz123
1 answer 540 views

Reduction in core losses and increase in permeability are obtained with transformer employing?

asked Mar 19, 2018 in Transformer by Shimroz123
2 answers 23 views

Losses which occur in rotating electric machines and do not occur in transformers are?

asked Mar 19, 2018 in Transformer by Shimroz123

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
...