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An electrical charge distributes itself equally between two conducting spheres of the same size. Knowing this allowed Coulomb to divide an unknown charge in half. Repeating this process would produce a sphere with one quarter of the initial charge, and so on.
As noted previously, electric charge is a property that an object can have. This is similar to how an object can have a property that we call mass, a property that we call density, a property that we call temperature, and so on. Technically, we should always say something like, “Suppose we have a particle that carries a charge of \(\mu C\).”
Calculate the force that charges exert on each other; Determine the direction of the electric force for different source charges; Correctly describe and apply the superposition principle for multiple source charges
Describe positive and negative electric charges; Use conservation of charge to calculate quantities of charge transferred between objects; Characterize materials as conductors or insulators based on their electrical properties; Describe electric polarization and charging by induction
The force (F) felt by a charged particle in an electric field is calculated using: F = qE. F = Force on the charged particle (N) q = the object's charge in Coulombs (C) E = strength of the electric field (N/C)
The electric field mediates the electric force between a source charge and a test charge. The electric field, like the electric force, obeys the superposition principle. The field is a vector; by definition, it points away from positive charges and toward negative charges.
Coulomb's Law Learning Targets. I can relate Newton’s Third Law of motion to charges. I understand Coulombs law and relationship between electrostatic force, charge, and distance. I can solve for electrostatic force, charge, and distance using Coulomb’s Law with two charges.
