what is more dagorous ac or dc?

Answer 1

AC voltage is fatal at a lower current but DC has certain characteristics that make fire a very real hazard.

Answer 2

That depends on the frequency. At 60 Hz ac will more easily kill you then dc because muscles only react to changing current. With dc they will only contract once in the moment you touch the wire and in the moment you let go again but with ac they contract all the time.
If the frequency is very high though e.g. 100kHz then the muscles won't contract at all which makes it safer then dc.

Answer 3

Under the worst biological conditions, as little as 10 mA will result in heart stoppage. Regardless of the type of current.

But, because of the high resistance of the body, a voltage of several hundred volts is normally required to reach this current.

This is not a very commonly available voltage in DC, but is commonly used in AC


Ken

Answer 4

Generally speaking, AC present more threat to a body, given that the current reverses direction every half a period. But that is not to say DC is not dangerous.

Answer 5

AC means alternating current in the sense that it flows alternately high &low.
DC means direct current sense that it is in 1way.
So ,if U fall in DC ur in imagination.
so DCis dangerous than AC.

Answer 6

They can both zap you pretty good. If you want a real charge DC style, grab a spark plug wire while your car's running.
I did.......twice........in the same day.
Woah!!!!

Answer 7

Yes, DC batteries are fairly safe, but the wires within AC wall outlets are not. However, this has little to do with AC versus DC. Electric wall outlets would be dangerous even if they were DC. This danger is caused by two main things:

1. high voltage
2. an ability to pump a large electric current


In the case of wall outlets versus batteries, it's the voltage of the power supply that makes the difference.

Electric currents cause harm when the charges in your body are forced to flow. Yet both batteries and wall outlets can pump a large electric current. But it's not their current-making ability that causes electrocution. Flashlight batteries can put out several amperes, yet batteries are safe because human skin is a relatively bad conductor. It takes a fair amount of electric "pressure" (or voltage) in order to force the charges within your body to start flowing. Touch both terminals of a D-cell, and the electric current in your skin will be so tiny that you can't feel anything. On the other hand, metal wires aren't like skin, and it only takes a tiny voltage to pump electric charge through a flashlight bulb. Because the voltage of a D-cell is very low, it can only create large currents in wires and in light bulbs, but not in people.

OK, if 1.5 volts from batteries is safe, then what level of voltage is "dangerous?" The answer:

it varies from person to person, but serious danger only appears when the voltage is higher than about 40 volts.

The voltage of a typical battery is far below the 40 volts needed to electrocute you. AC wall outlets are 120V, which is far higher than the 40-volt threshold. 120 volts can force a large electric current through your skin, and therefore wall outlets are dangerous. The "AC" is not the problem, since an AC 12-volt power supply (such as the type used with laptop computers) is not dangerous, even though it is AC. The 12v computer supply DOES have the ability to produce large currents in wires, but its voltage is too low, and it can't produce a large current in a human body because the skin is too resistive.

Humans are electrically protected by their skin. Here's a disgusting thought: remove your skin, and even a battery becomes a danger! If you have a big cut in your chest, don't go sticking a 9-volt battery into it. If you have huge cuts on your hands, then don't grab the terminals of a car battery. It could stop your heart! (I guess it's fortunate that most people don't stick electric wires into large open chest wounds. Yeesh!) It's especially dangerous when the path for current is through your heart. If you have a big open wound on both your hands, don't grab the terminals of a power supply, because the path for charges would lead into one wound, through your arm, THROUGH YOUR CHEST, then out through the other wound and back to the battery.

Flowing charge inside your body is dangerous, but it takes a voltage to create a charge-flow. A flashlight battery is probably not dangerous because the 1.5 volts can't create a large current in your heart. On the other hand, high voltage by itself is not dangerous. For example, if you slide across a car seat and then climb out of the car, 20,000 volts can appear between your body and the car! Touch the car, and you feel a painful spark, but you certainly aren't in danger of dying. High voltage was present, but there weren't any continuous electric currents. You can scuff your shoes on the rug and zap doorknobs all day with little harmful effect, even though the voltage occasionally approaches 10,000 volts. Everyday "static" sparks are not very dangerous, since the high voltage instantly vanishes when the spark occurs, and it cannot produce a large, continuing flow of charge through your body. To be dangerous, an electrical energy source needs to be above 40 volts so it can get through your skin. Also the energy source needs to be able to supply a large current for a long time (for at least a few seconds.)

OK, what about AC versus DC? What if the battery and the wall outlet both were 120 volts? Would one be safer than the other? Both can supply a large current, and both have dangerously high voltage. If we compare an AC high-voltage power supply with a DC supply of identical characteristics, here's one answer I've heard:

All else being equal, AC is SOMEWHAT more dangerous than DC because AC has a slightly greater effect upon your heart.

If an AC or a DC 120-volt power supply should shock you, and if the path for current should go across your chest, then the AC has a greater chance of triggering fibrillation and stopping your heart. Make no mistake, the 120V DC supply is nearly as painful and as dangerous. But if everything else is equal, a 60Hz AC high voltage cable is slightly more dangerous than a DC high voltage cable as far as your heart is concerned.

Another interesting tidbit: VERY HIGH VOLTAGE power supplies can actually be less dangerous than the medium-high voltage used in wall outlets. By "very high", I mean voltages well over 500 volts. High voltage can be less dangerous because high voltage can act as a natural heart-defibrillator. It re-starts your heart at the same time as it stops your heart. High voltage also tends to create very high currents, which force your muscles to contract, which can throw your body AWAY from the live conductors. If given the choice, I might prefer to touch a 1,000 volt wire than a 120 volt wire. With the 120 volts, my hands would latch onto the wire and I wouldn't be able to let go. With the 1,000 volt wire there would be a big flash and a loud bang, and I could be thrown across the room. (The energy didn't throw me, instead the current made the muscles of my legs and arms do the work.)

On the other hand, very high voltage has its down side. It can rapidly heat flesh and cause internal burns, whereas medium-high voltage would take much longer to cause this sort of damage. In the above paragraph, I might receive severe burns from touching that 1,000-volt wire, and maybe loose a finger or hand, but I'd still be alive. (But if I grabbed tightly to 1000 volts and couldn't let go, I'd quickly be roasted into charcoal. No fun at all!)

Answer 8

Put u r finger in and see

Answer 9

Neither. They are both deadly if not properly handled.