if dc is better then ac...then why we are perfering ac over
dc?eg:at home?

Answer Posted / thirumoorthy

we can step up or step-down the current only in Ac not in
DC.so we are using AC supply in home or transmission systems.


and also it has low loss.

Is This Answer Correct ?    10 Yes 2 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

HOW TO CALCULATE ELECTRICAL, MECHANICAL,& OVERALL EFICIENCY OF GAS ENGINE POWER PLANT

1536


what is difference between speed mode and torque mode in motor?? explain in simple words please.

1153


how can service sitting be setted for MCCB?Example for sittings IR (CURRENT RATING),IS(CURRENT STARTING)IO (current operating)?

1689


why would the rotor rotate at sub synchronous speed against the direction of rotating flux when d rotor of 3 phase IM is connected to 3 phase balanced supply and the stator windings are shortcircuited ??

1532


what is electrical machines

3019






What are test values for an 63 KVA and 100 Kva Distribution Transformers for the following typical tests 1)Magnetic balance 2)Short circuit test 3)Open Circuit test 4)Vector group confirmation test .please give me the standard values for all the above tests.

2264


What do you mean by phasors?

634


when will be the iocl interview results ifaced the interview on september 8 th

1637


Why single phase induction motors are not self starting ?

1057


What is voltage ratio of a transformer?

641


WHY L-G FAULT IS MORE SEVERE IN TERMS OF RRRV?

2721


what is active power & reactive power?

1718


What is the loss of transformer of 220kv/11kv, 63/80 MVA and 18.05% impedance

1552


why generator efficiency is more in swinburnes test?

1750


in general it is observed in power stations, the tertiary winding is used in higher rating Y-Y auto transformer but not in Y-Y power transformer. is the tertiary winding is compulsory then why it is not using in power transformer 

1296