A person can be killed if a current as small as 50 mA passes near the heart An electrician is working on a humid day with hands damp from perspiration Suppose his resistance from one hand to the other is1k and he is touching two wires, one with each hand (a) What potential difference between the two wires would cause a 50 mA current from one hand to the other (b) An electrician working on a live circuit keeps one hand behind his or her back Why

Question: A person can be killed if a current as small as 50 mA passes near the heart. An electrician is working on a humid day

A person can be killed if a current as small as 50 mA passes near the heart. An electrician is working on a humid day with hands damp from perspiration. Suppose his resistance from one hand to the other is1kΩ and he is touching two wires, one with each hand.
(a) What potential difference between the two wires would cause a 50-mA current from one hand to the other?
(b) An electrician working on a "live" circuit keeps one hand behind his or her back. Why?

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