Coulomb\'s law allows us to find the force between two point charges. Three poin
ID: 1273210 • Letter: C
Question
Coulomb's law allows us to find the force between two point charges. Three point charges are held fixed on a straight line with equal spacing; +Q, +q, -Q from left to right. Consider the following comment about this situation. "There will be zero net electric force on the charge in the middle due to the other charges. Using Coulomb's law, the force due to the +Q charge is positive, and the force due to the -Q charge is negative. The force cancel." Do you agree with this statement? How does Coulomb's law apply to situations in which there are more than two point charges?
Explanation / Answer
No the net force is not zero they will be in same direction.
For more than 2 charges coulomb's law can be applied but superposition principle is more helpful According to this principle when a number of charges are interacting the total force on a given charge is vector sum of forces exerted on it by all other charges.