What voltage would produce a noticeable current through dry skin?

  • Thread starter PepeF.
  • Start date
  • Tags
    Procedure
In summary, the conversation discusses the impact of electric shock on the human body, including the varying levels of current that can be felt, cause pain, or be fatal. It also mentions that skin resistance can change depending on whether it is dry or wet. The homework problem involves finding the minimum voltage that would produce a current that can be felt by a person with dry skin. The equation V=IR is used to solve the problem.
  • #1
PepeF.
16
0

Homework Statement



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.

Homework Equations



V=R*I

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:
Physics news on Phys.org
  • #2
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...
 

1. What exactly is the procedure here?

The specific procedure will depend on the context and the goal of the experiment or investigation. Generally, the procedure involves a series of steps that are followed in order to collect data and reach a conclusion.

2. Why is it important to follow a procedure?

A procedure provides structure and consistency to scientific experiments, ensuring that the results are accurate and repeatable. It also allows for other scientists to replicate the experiment and verify the results.

3. How do you determine the appropriate procedure for an experiment?

The procedure is usually determined through careful planning and research. Scientists will consider the purpose of the experiment, the variables involved, and any potential limitations or safety concerns before deciding on a procedure.

4. Can the procedure be changed or modified during an experiment?

In most cases, it is important to follow the procedure exactly as it is outlined in order to obtain accurate and reliable results. However, if unforeseen circumstances arise, adjustments may be made as long as they are carefully documented and do not significantly alter the experiment.

5. How do you know if the procedure was successful?

The success of a procedure can be determined by the results obtained. If the data collected is consistent and supports the hypothesis, then the procedure can be considered successful. It is also important to carefully analyze and interpret the results to ensure accuracy and validity.

Similar threads

Physics Help: Calculating Electric Shock Voltage/Current
    • Introductory Physics Homework Help
Replies
9
Views
2K
Current Electricity - current flowing through hand
    • Introductory Physics Homework Help
Replies
4
Views
3K
What is the solution to the 12 resistor cube problem using symmetry?
    • Introductory Physics Homework Help
Replies
3
Views
3K
B Can high voltage static electricity cause a shock through a power cord?
    • Other Physics Topics
Replies
6
Views
1K
How to get Voltage vs. Time graph from having Current and Voltage values.
    • Introductory Physics Homework Help
Replies
1
Views
8K
Electrostatic physics: can someone check my answers?
    • Introductory Physics Homework Help
Replies
1
Views
3K
Electrostatic discharge current
    • Electromagnetism
Replies
1
Views
1K
Resistor Connections and Applications: Exploring Resistance in Circuits
    • Introductory Physics Homework Help
Replies
13
Views
4K
Where Does Electrical Current Travel Through the Body?
    • Electrical Engineering
Replies
1
Views
4K
Engineering What Voltage Should Be Applied to Achieve a Change in Capacitor Energy of 4uJ?
    • Engineering and Comp Sci Homework Help
Replies
1
Views
2K

Hot Threads

Recent Insights

Back
Top