Electric Force charge magnitude

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SUMMARY

The discussion centers on calculating the magnitude of a second charge given a 1.0-C charge, a distance of 15 m, and a force of 1.0 N between the charges. Using Coulomb's Law, represented by the equation F = k(q1)(q2)/r^2, the solution for the second charge (q2) is derived as 25 nC. The calculation confirms that the setup is correct, and the use of nanocoulombs (nC) is appropriate for this context.

PREREQUISITES
  • Understanding of Coulomb's Law
  • Basic algebra for solving equations
  • Knowledge of units of electric charge (Coulombs and nanocoulombs)
  • Familiarity with constants such as Coulomb's constant (k)
NEXT STEPS
  • Review Coulomb's Law and its applications in electrostatics
  • Learn about the significance of charge units, specifically nanocoulombs (nC)
  • Explore examples of force calculations between point charges
  • Investigate the implications of charge distance on electric force
USEFUL FOR

Students studying physics, particularly those focusing on electrostatics, as well as educators preparing for exams involving electric force calculations.

Octoshark
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Homework Statement



A 1.0-C charge is 15 m from a second charge, and the force between them is 1.0 N.
What is the magnitude of the second charge?

Homework Equations



F = k(q1)(q2)/r^2

The Attempt at a Solution



F = k(q1)(q2)/r^2 need to solve for q2 so...

F(r^2)/k(q1) = q2

1N(225m)/(9x10^9)(1C) = 25nC

That is correct, right? I just wasn't sure because this is on my sample exam, but we never used nano numbers during class so I wanted to double check.
 
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Octoshark said:

Homework Statement



A 1.0-C charge is 15 m from a second charge, and the force between them is 1.0 N.
What is the magnitude of the second charge?

Homework Equations



F = k(q1)(q2)/r^2

The Attempt at a Solution



F = k(q1)(q2)/r^2 need to solve for q2 so...

F(r^2)/k(q1) = q2

1N(225m)/(9x10^9)(1C) = 25nC

That is correct, right? I just wasn't sure because this is on my sample exam, but we never used nano numbers during class so I wanted to double check.
though i didn't actually calculate it, your setup looks right. nC is a common measure of charge.
 

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