Coulomb's law is a fundamental law in physics that describes the force between two electrically charged particles. It states that the force between two point charges is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.
Coulomb's law is calculated using the equation F = k(q1q2)/r^2, where F is the force between the two charges, k is the proportionality constant, q1 and q2 are the charges of the two particles, and r is the distance between them.
In Coulomb's law, one charge being placed between two others is significant because it allows us to calculate the force that the two outer charges exert on each other. The middle charge serves as a mediator, affecting the force between the other two charges.
If the distance between the charges is doubled, the force between them will decrease by a factor of four. This is because of the inverse square relationship in Coulomb's law, where the force is inversely proportional to the square of the distance between the charges.
Yes, Coulomb's law can be applied to non-point charges, but only if the charges are spherically symmetric and if the distance between them is much larger than their sizes. In this case, the charges can be treated as point charges for calculation purposes.