3 applications where direct current is preferred over alternating current?

Answer 1

1st is in a.c there is frequency say 50 hz in d.c. it is zero means a.c. produces 50 cycles per second . n d.c. is steady current. 2nd is in a.c inductance comes into picture. but when it is d.c. inductance is zero. 3rd is in a.c skin effect is there. due to this its resistance is high in a.c. as compared to when d.c. current is flowing. 4th is in a.c ,we can quench the arc when fault occurs very easily rather then d.c. current. 5th and major difference is that when we have a.c. quantity we are able to step up or step down the voltages but in d.c. its not possible to get. i hope everybody can understand. bye.

Answer 2

1: while transferring current through overhead cables for really long distances, HVDC-high voltage direct current is used, as it is best to transfer large amounts of currents through long distances with little capital (setting-up) costs and lesser loss in current: just about 3% loss in current for every 1000km.loss while transmission through AS current is more.

however AC current is preffered for transmission over small distances as the cost of setting up AC to DC converters are high when it comes to small distances.

2:DC is used in cases where low voltage is all you need. like for cameras, cell phones, torch lights, and small handy appliances.

3: as DC voltages are normally low, (12V,24V.....etc, etc.), they do not cause electrocution(electric shock) as the voltages are low. so they are used in appliances which will often be touched by us.

however high DC voltages: once in the long distance overhead cables, will hurt quite as much as the AC current. basically you'll get a bad shock.

AC causes a series of shock....

Answer 3

I depends on what you want to do.
For short distances DC will be more efficient, but AC rules for long distances.

Answer 4

alternating current over direct current