• Support PF! Buy your school textbooks, materials and every day products via PF Here!

What is the procedure here!

  • Thread starter PepeF.
  • Start date
16
0
1. The problem statement, all variables and given/known data

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
1.1 × 10^5
. When skin is wet, the resistance
drops to about 5100
.
What is the minimum voltage placed across
the arms that would produce a current that
could be felt by a person with dry skin?
Answer in units of V.


2. Relevant equations

V=R*I



3. The attempt at a solution

i want to know the procedure to solve this problem
i have tried, but i don't quite understand the problem
 
Last edited:

collinsmark

Homework Helper
Gold Member
2,723
1,065
You haven't specified the units of resistance, but assuming you have them there with you, the resistance is "R" in the equation. The current is expressed as "I" in the equation. "V" is the voltage. And you have the equation V = IR, so...
 

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving

Hot Threads

Top