How to Find the Potential Difference in a Copper Wire?

In summary, to find the potential difference between the ends of a copper wire, use the equation V = IR, where I is the current and R is the resistance. The resistivity of copper is 1.68 * 10^-8 and the diameter needs to be converted to meters. To find the necessary diameter for a potential difference of 0.100V, use the same equation and solve for the diameter.
  • #1
johndoe14
4
0

Homework Statement


A current of 1.82A flows through a copper wire 1.75m long and 1.10mm in diameter.
a)find the potential difference between the ends of the wire
b) what diameter of copper wire is needed to be a potential difference of .100V


Homework Equations


I know the resistivity of Cu is 1.68 * 10^-8
the diameter needs to be converted to M


The Attempt at a Solution


I am unsure of how to set the problem up


Can someoe please give detailed steps of how to set this problem up and any conversions or other given factors that ay be needed. I am still waiting on my back ordered book to arrive :(
 
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  • #2
hi johndoe14! :wink:

potential difference is the same as voltage so use V = IR …

what do you get? :smile:​
 

FAQ: How to Find the Potential Difference in a Copper Wire?

What is potential difference?

Potential difference is the difference in electric potential between two points in an electric field. It is also known as voltage and is measured in volts (V).

How is potential difference measured?

Potential difference is measured using a voltmeter, which is a device that measures the electrical potential between two points in a circuit. The voltmeter is connected in parallel to the component or circuit being measured.

What is the formula for calculating potential difference?

The formula for calculating potential difference is V = W/Q, where V is the potential difference (in volts), W is the work done (in joules), and Q is the charge (in coulombs) passing through the circuit.

How does potential difference affect the flow of electricity?

Potential difference is what drives the flow of electricity in a circuit. The greater the potential difference, the more energy is available to push the electric charges through the circuit. In other words, the higher the potential difference, the stronger the electric current will be.

What factors affect potential difference?

The factors that affect potential difference include the type and material of the source of electricity, the conductivity of the material in the circuit, and the resistance of the circuit. Changes in these factors can lead to changes in potential difference.

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