Answer / pandi

there is a one way u have to check the rotor if the
commutator and brush assembly present in dc motor but not in
AC motor .

but in size dc motor size quit large compare then Ac motor
and also usually Ac motor has outer cooling fins and blower
which is fixed on shaft in case of dc motor forced air
cooled inside the motor in-order to dissipate the heat .

Answer / jignesh mistry

Ac Motors Body construction is slotted where In Dc motors construction is plain.reasons are given below.
In ac motors armature is static therefor more current for cooling purpose fins are required,thats why on motor body slots are given.
In case of DC Motors Armature is rotating therefor heat produced due to armature current.there for cooling ventilation
is required.and field is static,and it takes very small amount of current so thre is no cooling requirement for that.

Answer / amol dhanbhar

Incase DC motor if u interchange the terminal,motor can be rotate reverse direction vice-versa.
Incase inductions motor if u interchange the terminal, motor can't be reversed

Answer / marippan

Commutator is present even in ac series motor

Answer / gunasekhar

very simple . a DC motor has a commutator which is mounted on
shaft. but induction motor have no commutator . it is
identified by its its winding connections[terminal box]

Answer / swum

dc motors are usually smaller in size compared to ac motors

www.professionaldoordealer.com/articles/2006/05/ac-vs-dc.aspx

What would be the ratio of a Delta-Wye tranformer having 48000 volts phase to phase on the primary and 4160 volts phase to phase on the secondary?

5 Answers  

Why r use in the tap changing x' mer.

2 Answers   L&T,

how much speed will trawiling current

3 Answers   TCS,

what is a,b,c,d checks diesel generator?

1 Answers   AFMC,

What happens if the Capacitive Voltage Transformer Primary neutral is not earthed. There is a CVT between Transformer and source, and the CVT neutral of the transformer is not earthed, does it effect the transformer while charging or does it effect the transformer charging process.

1 Answers  

what is the use of neutral?

14 Answers   IOCL,

what is OLTC and difference between RTCC and OLTC

7 Answers   Sodexo,

It is being often experienced that due to single phasing fault of any source transmission line of any closed loop synchronized circuit all the power transformers with primary stared trips but the power transformer with primary delta wont, why ?

1 Answers   MSEB,

In a tap changing transformer where is the tap connected, is it connected in the primary side or secondary side?

0 Answers  

why are we maintaining some specific gravity in battery ?

5 Answers  

what diff. between earth nd neutral?

3 Answers   NTPC,

what will happen if we use cylindrical conductor instead of flat cu conductor in transformer

2 Answers   Crompton Greaves,