Coulomb's Law (Electric Force) Video Lessons

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Problem: Three charged particles are arranged along a line as in this figure.What is the charge on particle 3?

FREE Expert Solution

In this problem, we're going to use Coulomb's law:

F=kq1q2r2, where F is the electric force, k is Coulomb constant, and q1 and q2 are charges separated by distance r. 

From Coulomb's law, F12 is:

F12=kq1q2r122=(9×109)(4.0×10-9)(2.0×10-9)(10×10-3)2

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Problem Details

Three charged particles are arranged along a line as in this figure.

What is the charge on particle 3?

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