# Magnitude of the Line Charge Density of a Power Line

• frankifur
In summary, the individual was confused about how to use Latex on a website and attached a file with their work and thought process. They were directed to a guide for using Latex and expressed appreciation for the helpfulness and welcoming nature of the community. They also mentioned wanting to use a better equation, closer to ## dV = -E\, dr ##.
frankifur
Homework Statement
The potential difference between the surface of a 3.1 cm - diameter power line and a point 1.4 m distance is 3.9 kV.
Relevant Equations
Delta V = - E Delta r
Phi = Integral (E A) = qenc/epsilon naught
Okay so I am a little confused as to where I made a mistake. I couldn't figure out how to program Latex into this website but I attached a file with the work I did and an explanation of my thought process along the way.

#### Attachments

• Physics Homework Help.pdf
119.7 KB · Views: 73
• Screenshot 2023-02-13 at 3.34.33 PM.png
13.2 KB · Views: 54
Welcome to PF.

frankifur said:
I couldn't figure out how to program Latex into this website
See the "LaTeX Guide" link at the lower left of the Edit window.

MatinSAR and frankifur
Hello @frankifur ,

frankifur said:
confused as to where I made a mistake

You want to use something better than ##\Delta V = -E\,r ##. Closer to ## dV = -E\, dr ##.

##\ ##

MatinSAR and frankifur
I figured it out, thanks for the help and I appreciate how welcoming you all have been!

BvU, MatinSAR and berkeman

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