What is the difference between AC voltage and DC voltage?

Answer Posted / nagarjuna

AC VOLTAGES HAVE +VE AND -VE PEAKS.
AC VOLTAGES WIL HAVE FREQUENCIES.
DC VOLTAGES DNT HAVE AMPLITUDE.
DC VOLTAGES DNT HAVE ANY FREQUENCIES.

Is This Answer Correct ?    17 Yes 5 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

1. What is maximum permissible distance between smoke detectors ? 2. How do we decide number of smoke detectors required in a large office, warehouse, hall etc ? 3. What should be maximum height of smoke detectors ? 4. Where do we use heat detector, optical smoke detector, temperature sensitive detector ?

2379


It is desired to flood light the front of a building 42 meters wide and 16 meters hig.Projectors of 30 degree beam spread and 1000 watt lamps giving 20 lumen/watt are availabl.If the desired level of illumination is 75 lumen/m and show a suitable scheme.Assume the cofficient of utilization, deprecitation factor and waste light factor are 0.4, 13 and 1.2 respectively.

2970


Application Comparison between 22KV (UE)and 33KV (E) system. Are we allowed to use 33KV (E) cable in lieu of 22KV (UE) cable. What are the technical disadvantages.

1839


one electromagnet is called

1423


I HAVE A 50A MCCB AS PER DESIGN LINE WIRE CONNECT UPWORD SIDE AND LOAD IS CONNECTED TO DOWNWARD SIDE TO THE MCCB.IF NOW ANY ONE CHANGE SUPPLY & LOAD(WISEVERSA) WHAT HAPPENS ? DOES MCCB OPERATION OR WORKING FUNCTION NORMAL IF YES THAN WHY THERE ARE MARKED LINE & LOAD ON MCCB.

1921






As i want some model question paper in basic computer science and history please send me immediately sir

1436


What happens if we run alternator on under frequency? 

1637


how we can adjust for three phase motor cold stall time ,hot stall time and thermal register set up?

2506


how the phase convertor changes the no. of phases

1542


Is it true online ups having bypass mode if it is true then why we called ups because it is interrupting power when goes in bypass mode

1546


Why neutral point is consider as zero potential?

2034


what is tri state logic gate

1614


difference between ac series and parallel circuit

1467


What is resistance reading of earth copper rod with grid and without grid?

645


When are the directional relays used?

606