Question

Alternating current at $220\,V$ is more dangerous than direct current of $220\,V$ . Why?

Answer 1

As we will show how a.c at $220V$ is more dangerous than direct current of $220V$ . When the human body acts as a capacitor, AC is more harmful than DC.In short, DC has lower impedance and resistance than AC because frequency decreases impedance and resistance.

Complete step by step answer:
$220V$ a.c means the effective or virtual value of a.c is $220V$ , i.e.
${V_{rms}} = \sqrt 2 {V_{rms}}$
As peak value,
${V_0} = \sqrt 2 {V_{rms}} \\\ \Rightarrow {V_0} = 1.414 \times 220 \\\ \Rightarrow {V_0} = 331\,volt \\\$
But $220V$ d.c has the same peak valve (ie., $220V$ ). Moreover the shock of a.c is attractive and that of d.c is repulsive.The dangers of alternating current (A.C.) are five times greater than the dangers of direct current (DC) (D.C). The main cause of this harmful effect on the human body is the alternating current's frequency. A cycle frequency of 60 cycles is particularly dangerous. Even a little voltage of 25 volts can kill a person at this frequency.

The energy efficiency of DC power is much higher than that of AC power. DC motors and appliances are more efficient and have better power-to-size ratios. Recent advancements in DC converter technology have resulted in increased efficiency, allowing for better electrical distribution over vast distances.

Hence 220V a.c is more dangerous than 220 volts d.c.

Note: Force becomes appealing in AC due to constantly changing polarities, and neurons provide erroneous information to the brain. As a result, the hand becomes caught and may experience a significant shock.