The average bulk resistivity of the human body (apart from the surface resistance of the skin) is about$50-m$. The conducting path between the hands can be represented approximately as a cylinder $1.6 m$long and$0.1 m$ diameter. The skin resistance may be made negligible by soaking the hands in salt water. A lethal shock current needed is $100 mA.$ Note that a small amount of potential difference could be fatal if the skin is damp.

The power dissipated in the body is