Electric Charge Video Lessons

Concept

# Problem: Two small plastic spheres are given positive electrical charges. When they are a distance of 14.0 cm apart, the repulsive force between them has a magnitude of 0.250 N .Part AWhat is the charge on each sphere if the two charges are equal?Part BWhat is the charge on first sphere if it has four times the charge of the other?Part CWhat is the charge on the second sphere?

###### FREE Expert Solution

The force acting between the two spheres will be repulsive and given by:

$\overline{){\mathbf{F}}{\mathbf{=}}\frac{\mathbf{k}{\mathbf{Q}}^{\mathbf{2}}}{{\mathbf{r}}^{\mathbf{2}}}}$

Part A

From the equation, we can get the charge on each sphere as:

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###### Problem Details

Two small plastic spheres are given positive electrical charges. When they are a distance of 14.0 cm apart, the repulsive force between them has a magnitude of 0.250 N .

Part A

What is the charge on each sphere if the two charges are equal?

Part B

What is the charge on first sphere if it has four times the charge of the other?

Part C

What is the charge on the second sphere?