Coulomb's Law (Electric Force) Video Lessons

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Example

Problem: Suppose you have two point charges each of 79 nC. How many millimeters apart must the two charges be to have a force of 1.15 N between them?

FREE Expert Solution

The electric force between two point charges is found from Coulomb's law:

F=kq1q2r2

Coulomb's constant, k = 9.0 × 109 kg⋅m3⋅s−2⋅C−2.

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Problem Details

Suppose you have two point charges each of 79 nC. How many millimeters apart must the two charges be to have a force of 1.15 N between them?

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