CASE # $2$: The Apprentice Worker

One hot summer morning, a $23-$year$-$old apprentice construction worker had just started his shift when he felt a tingling sensation in his hand while using an electric power drill. The young man took the drill to the air$-$conditioned construction trailer where the $59-$year$-$old project manager worked. The project manager plugged the drill into a wall socket but did not feel any tingling. Assuming the young man was trying to get out of his assigned tasks, he told the young worker either to use the drill to complete his job assignments or to punch out and go home. The young man was angry and returned to his work area. The apprentice spent the next ninety minutes working on various tasks. He then returned to the assignment requiring the use of the drill. He plugged in the drill, knelt down on one knee and began to drive a screw into a board. Co$-$workers saw the employee on the floor convulsing. A co$-$worker was able to knock the extension cord from the source and power to the drill was cut. The apprentice suffered a cardiac episode before an emergency crew arrived. Efforts to revive the young man were unsuccessful.

Questions:

$1.$ What is the likely resistance of the project manager$$s skin?

$2.$ What is the likely resistance of the apprentice$$s skin?

$3.$ Using Ohm$$s Law and a voltage or $120,$ calculate the flow of current experienced by both the project manager and the apprentice.

$4.$ If there was an increase in voltage to $220,$ what will be the current flow experienced by both the project manager and the apprentice. Based on the results obtained in questions $3$ and $4$ what can be deduced about the relationship between voltage and current?

$5.$ What is the pathway of exposure to electric shock in the case? Explain.