Answer to Question #117245 in Electric Circuits for Ben

Question

In the context of the dangers of working with electricity, use a diagram of the body to illustrate specific points and supplementary notes to explain:

Answer 1

Electric Current: (1 second contact)Physiological Effect

1 mA : Threshold of feeling, tingling sensation.

5 mA : Accepted as maximum harmless current

10-20 mA : Beginning of sustained muscular contraction ("Can't let go" current.)

100-300 mA : Ventricular fibrillation, fatal if continued. Respiratory function continues.

6 A : Sustained ventricular contraction followed by normal heart rhythm. (defibrillation). Temporary respiratory paralysis and possibly burns.