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Why is AC More Dangerous than DC of same voltage

Why is AC More Dangerous than DC of same voltage :-In our homes, AC supply is usually 220 volts. This 220 volts is the root mean square (RMS) value of the voltage. Therefore, the peak value of the alternating voltage is,

$\displaystyle {{V}_{0}}=\sqrt{2}\times {{E}_{rms}}=\sqrt{2}\times 220=1.414\times 220$

∴ E₀ = 311 Volt

Thus, the alternating voltage supplied to our homes varies from +311 volts to –311 volts in each cycle. In other words, the maximum change in AC voltage during one cycle is 622 volts. This is why a 220-volt AC supply is more dangerous than a 220-volt DC supply.

Comparison of the effects of alternating current and direct current on the human body :

Nerve and muscle response : The frequency of AC current (such as 50 or 60 Hz) causes continuous contraction of nerves and muscles, making it difficult for a person to let go when in contact with AC. In contrast, DC provides a steady current, which may give a sudden shock and allow the person to pull away.
Effect on the heart : AC current can disturb the natural rhythm of the heart and may lead to fibrillation, which can be fatal. DC current is less likely to cause such severe effects on the heart.
Physical reaction : Because AC continuously changes direction, it applies constant pressure on the muscles, whereas DC usually gives a single strong push, helping a person break free.

However, at high voltages both types of currents are lethal, but at the same voltage AC is considered more dangerous.

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Why is AC More Dangerous than DC of same voltage

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