Coulomb's Law (Electric Force) Video Lessons

Concept

# Problem: Two point charges, each with 0.1 C (0.1 Coulombs) of charge, are 0.1 m (0.1 meters) apart. Given that k = 9.0×109 Nm2/C2 (the proportionality constant for Coulomb's law), show that the force between the charges is 9.0×109 N.

###### FREE Expert Solution

From Coulomb's law, the electric force is expressed as:

$\overline{){\mathbf{F}}{\mathbf{=}}\frac{\mathbf{k}{\mathbf{q}}_{\mathbf{1}}{\mathbf{q}}_{\mathbf{2}}}{{\mathbf{r}}^{\mathbf{2}}}}$, where k is Coulomb's constant and r is the distance between the two charges, q1 and q2.

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###### Problem Details

Two point charges, each with 0.1 C (0.1 Coulombs) of charge, are 0.1 m (0.1 meters) apart. Given that k = 9.0×109 Nm2/C2 (the proportionality constant for Coulomb's law), show that the force between the charges is 9.0×109 N.