Which current,Either Alternating_AC current or Direct Current_DC is more dangerous? Kindly explain the reaso?

I can't sleep at night peacefully everytime I glance at that wall socket Your not the only one. I refer you the the seminal works of James Thurber: http://books.google.com/books?id=KnQnkBD... what actually is an AC? Start with a simple thought experiment.

Think of a 12 volt car battery & tail lamp bulb connected to two wires. If you just connect the wires to the battery terminals you are using a DC power source. But if you keep switching the two wires between the two terminals of the battery as fast as you can you are using an AC power source.

You can imagine making a mechanical contraption that will switch the leads much faster than you can so that you don't see the light flicker. In North America imagine the wires being switched 120 times a second, which equals 60 cycles per second. A model of what comes out of your wall outlet is a slightly more complicated.

Imagine two 12 volt batteries in series. Connect one of the wires going to the bulb to the center battery terminal and a stake hammered into the ground. The other wire is switched between the other two battery terminals (+ and - ) rapidly.

This makes the system safer because (if the outlet is wired correctly) only one of the slots is "hot" (Has enough voltage to kill you). In North America this should be the slightly wider slot on the right. As for the safety thing, imagine removing the bulb from a lamp with an ordinary screw in bulb.

If everything is wired correctly, the button on the bottom of socket is the hot contact and runs though the switch. So the only way to shock yourself should be to reach into the bottom of the socket while the lamp is plugged in and the switch is turned on. Now you may wonder, why bother with alternating the direction of the voltage & current?

The answer is that in the late 19th century it was discovered that you can't make a modern power grid using DC voltage/current. This was called the "War of the Currents". See: http://en.wikipedia.org/wiki/War_of_Curr... The main reason is that with AC you can use electromagnetic induction to change voltages.

This greatly reduces the energy losses in moving power over long distances. In other words even in the late 19th century they understood something about energy conservation. But I want to know is its behavior in a circuit.

AC current is any current that is not unidirectional. Pulsating DC current is alternating current in that it starts at zero, goes to some positive value and then returns to zero, thus it is alternating between zero and some positive value, then back to zero. It is still considered DC since it does not reverse current direction, but is pulsating.

My point is that current that is "alternating" is not remaining in a steady state condition. When considering the AC power supplied to your home by the local power company, the reason it is alternating is because of the way it is created or generated at the power plants. An AC generator or alternator, spins a magnet which in turn produces an EMF (electro magnetic force) in the surrounding coils of copper wire.

Since the magnet is rotating in a complete circle it alternates the position of the north pole of the magnet with the south pole. This in turn changes the polarity of the EMF and thus the current fluctuates from positive to negative, alternating. The attached source may help to further explain it.

Hope this helps, Newton1Law.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.