The damage caused by electric shock depends on the current flowing through the body; 1 mA can be felt and 5 mA is painful. Above 15 mA, a person loses muscle control, and 70 mA can be fatal. A person with dry skin has a resistance from one arm to the other of about 80000 ?. When skin is wet, the resistance drops to about 5200 ?.
What is the minimum voltage placed across the arms that would produce a current that could be felt by a person with dry skin?