Answer / manjunatha

the voltage generated due to the raotation of armature is
called back emf and it tries to oppose the terminal voltage.

Answer / alvin

back emf refers to the opposing voltage
induced in a motor when motor is
connected to a supply this is as per faradays
law , whenever a current carrying
conductor cuts magnetic field an emf is
induced in it, and is in opposite direction as
that of applied field...

Answer / jayan

Back emf is regeneration in dc motors

Answer / harekrushna sahoo

`back emf is happen in case of d c motor.it working to
oppose the terminal voltage.

Answer / kapil bahadure

Back emf :-DC motor connected to supply then magnetc flux
produced by armature windings.this magnetic flux oppose to
the supply voltage.its denoted by eb.7 also colled as
counter emf.eb occur in the dc machine.
eb=-V-IaRa.

Answer / srinu

back emf is produced in all motors due to rotation ,motor act as generator and produce emf ,this emf is oppose the applied voltage,this is called back emf,this is directelly propostionl to rpm

What are the basic elements used for modeling mechanical rotational system?

0 Answers  

what is R Core Transformer. how it differs from normal transformers. dont search in net and post the answer.

0 Answers  

what is the difference between Resistance VS capacitance

2 Answers   Jindal,

My meter ratio is -/5 and ct ratio is 100/5 now what will be the multiplying factor and how ?

1 Answers  

state basic meaning of 'INDUSTIAL AUTOMATION'?

0 Answers  

what must be the mf for a meter with the following conditions. line ct ratio-100/1 line pt ratio- 220kv/110v meter pt ratio- 3X63.5V meter CT ratio- -/1 A

1 Answers  

Why delta star trformers are used for lighting loads?

0 Answers  

We are preparing another project which involves Waste heat recovery from a 1 MW GE Engine. The Engine in particular gives out flue gas at 487Deg C with a flow rate of 5650 kg/hour and this can be cooled to 180 Deg C. This gives a thermal output of ~ 594 KW that is available for input to VAM via heat exchanger / boiler. Additionally 581 KW will be available from engine jacket water (temperature profile 80/ 80 Deg C and a flow rate of 50m3/hr) Our estimation is that 300 TR of cooling is possible with a suitable VAM machine(s). Please advise what is the most suitable arrangement with maximum TR and min Capital expenditure. plz reply me as early as possible

0 Answers  

what is mean by unity power factor?why are u calling Resistivity load also unity power factor?

2 Answers  

What si the d/f b/w KVA & KWH, kvarh & kvar, kwh & kvar phase voltage & line voltage

0 Answers   Indeco,

define transient state &steady state

1 Answers  

why for transformer protection we protect tranformer from 3rd hormonics and 5th hormonics and what is the reason of generating these horminics in electrical system?

2 Answers   Essar, LG, OPS,