Coulomb's Law (Electric Force) Video Lessons

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Problem: Charge q2 in the figure is in static equilibrium. Assume q = -8.1 nC.What is q1 in nC?

FREE Expert Solution

We're told that the charge q2 is in static equilibrium.

This means that the net force on q2 due to q and q1 must be equal. 

Coulomb's law:

F=kq1q2r2, where k is Coulomb's constant and r is the distance between two charges q1 and q2.

The electrostatic force between q1 and q2:

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Problem Details

Charge q2 in the figure is in static equilibrium. Assume q = -8.1 nC.
What is q1 in nC?

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