Both AC and DC can be very bad for you. Ac is usually thought to be more dangerous. Here are some reasons why:
Effect on the Heart:
AC can cause an irregular heartbeat, which is super dangerous. This can happen with lower currents, like 100-300 milliamps at 60 Hz. This is because AC keeps changing direction, which can mess with the hearts rhythm.
DC on the hand tends to make your muscles contract. This can still be really bad. It often makes you move away from the current source because of the strong contraction. With AC your muscles might freeze, which makes it harder to get away.
Frequency Factor:
The usual AC frequency in homes 50-60 Hz is especially bad because its close to the hearts frequency. This makes it more likely to cause problems with the heartbeat.
Perception and Let-Go Threshold:
AC has a threshold where you can't let go of something thats shocking you. This is because your muscles contract involuntarily. With DC this threshold is higher. Its still really bad.
Peak Voltage:
For the voltage level AC can reach a much higher peak voltage than DC. For example 230V AC can reach a peak of about 325V, which can cause a shock than 230V DC.
However DC can also be super dangerous with high voltages like those, in electric cars or certain batteries. Both AC and DC need to be handled with proper safety measures.
