My Answer: Explanation of Solutions for Electricity and Magnetism Problems

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SUMMARY

The discussion focuses on solving three specific problems related to electricity and magnetism. The first problem involves calculating the distance required to nullify the electrical potential at a point near a charge of 600 V and an electric field of 200 N/C, with a proposed answer of 1.5 m. The second problem calculates the potential energy of a system of three charges arranged in a triangle, yielding an answer of -24.6x10^3 J. The third problem determines the charge per unit area on two parallel metallic plates connected to a 90 V source, resulting in an answer of -3.2x10^-7 C/m². The discussion emphasizes the need for clarity in the equations and calculations used to arrive at these answers.

PREREQUISITES
  • Understanding of electric potential and electric fields
  • Knowledge of Coulomb's law and potential energy calculations
  • Familiarity with the concept of charge distribution on conductors
  • Basic trigonometry for calculating angles and distances in charge configurations
NEXT STEPS
  • Review the equations for electric potential and electric field interactions
  • Study the principles of potential energy in electrostatic systems
  • Learn about charge distribution on parallel plates and capacitance
  • Explore problem-solving techniques for electrostatics involving multiple charges
USEFUL FOR

This discussion is beneficial for physics students, educators, and anyone involved in electrical engineering or electrostatics, particularly those looking to enhance their problem-solving skills in electricity and magnetism.

Arkangelunix
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good afternoon, these are my problems, I already tried to solve them but my anwers isn't well:

1-the electrical potential at certain distance of a charge of 600 V. and the electrical field is 200 N/C. At what distance of this charge is it necessary to place a charge of 0.1x10 ^-6 C and the opposite sign for that the potential in the same point is null?
My Answer: 1.5m

2-three charge q1 = 1.5x10 ^-3 C, q2 = 0.5x10 ^-3 C and q2 = 0.2x10 ^-3 C are distributed in a plane, forming a triangle. The straight line that it joins q1 with q3 measures 1 m, the straight line that it joins q2 with q3 measures 0.5 m and the angle that both straight lines form is 30 °. Which is the potential entire energy of the system?

My answer: -24.6x10^3 J

3-Two metallic big and parallel badges are placed at a distance of 0.5 cm between both. if between them there gets connected a source of electrical energy which difference of electrical potential is 90 V.: Which will be the charge for unit of area in the surface of the badges?

my answer: -3.2x10^-7 C/m^2

thnks for att.
 
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Can you tell us how you got your answers so that we can find any mistakes you made? You don't have to post long explanations; just show what equations you used and what numbers you plugged in.
 

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