trains run on ac or dc??
if ac or dc what are the advantages and disadvantages?????

Answer Posted / rocky

In addition to this , in AC motors, the 25kv ac supply is
first converted to dc ant then again converted to ac to
have a better speed control as we cannot control speed with
50hz supply.

Is This Answer Correct ?    8 Yes 3 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

what are the types of handover?

603


What is step down chopper?

616


What is a low-pass filter?

658


is embeded technology is necessary for every electronics engineer?

1542


what is reconfiguration of E1

1829






explain the advantages of power factor correction is an RLC circuit for a commercial customer, include tarifs..

4077


Explain why nand-nand realization is preferred over and-or realization?

820


what is a tetrode transisitor ? show the structure of such a device and indicate the polarity of the biasing voltage applied to each element?

1425


Explain resistivity?

615


What is the difference between transducer and transponder?

545


What are the methods of reduction of harmonic content?

591


What is meant by the temperature coefficient?

608


Explain the various components used in creating digital circuits?

608


What is the main drawback of a dual slope adc?

666


what procees happens when u try to open a web page

1849