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- Coulomb's law is the magnitude of the forrce F between two charges. The symbol for electric charge is Q. Charges are assumed to be point charges.
Fe = k q1q2/r2
- The constant k is known as the Coulomb coonstant and has the value 9 x109 Nm2 /C2 .
- Coulomb's law closely resembles Newton's law of gravitation.
Fg= G m1m2/r2
- The law of gravitation is dominant in sysstems on larger scales, like planets and stars.
- Coulomb's law is dominant in systems on ssmaller scales, like atoms, molecules, liquids, and solids.
- The electric force is a vector quantity Coulomb's law is the magnitude of the force between any two charges.
- If only two charges are present in the syystem, the net force is directed along the line connecting the two charges.
- If there is more than two charges presentt in the system, the direction of the net force can be calculated by the component method of vector addition.
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