Coulomb's Law (Electric Force) Video Lessons

Concept

# Problem: The electric force between two point charges is given by Coulomb's Law  F = kq1q2/r2.If you make the distance between two charges 5.43 times larger, the electric force they exert on each other becomes _______ times smaller. (Use 3 numbers in your answer).

###### FREE Expert Solution

Coulomb's law:

$\overline{){\mathbf{F}}{\mathbf{=}}\frac{\mathbf{k}{\mathbf{q}}_{\mathbf{1}}{\mathbf{q}}_{\mathbf{2}}}{{\mathbf{r}}^{\mathbf{2}}}}$

r is the distance between the charges q1 and q2.

If we make r 5.43 times larger, the new electric force will be:

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###### Problem Details

The electric force between two point charges is given by Coulomb's Law  F = kq1q2/r2.
If you make the distance between two charges 5.43 times larger, the electric force they exert on each other becomes _______ times smaller. (Use 3 numbers in your answer).

What scientific concept do you need to know in order to solve this problem?

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