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- https://phys.libretexts.org/Bookshelves/Electricity_and_Magnetism/Electricity_and_Magnetism_(Tatum)/02%3A_Electrostatic_Potential/2.02%3A_Potential_Near_Various_Charged_Bodies/2.2A%3A_Point_ChargeLet us arbitrarily assign the value zero to the potential at an infinite distance from a point charge Q. “The” potential at a distance r from this charge is then the work required to move a unit posit...Let us arbitrarily assign the value zero to the potential at an infinite distance from a point charge Q. “The” potential at a distance r from this charge is then the work required to move a unit positive charge from infinity to a distance r.
- https://phys.libretexts.org/Bookshelves/College_Physics/College_Physics_1e_(OpenStax)/19%3A_Electric_Potential_and_Electric_Field/19.03%3A_Electrical_Potential_Due_to_a_Point_ChargeElectric potential of a point charge is V=kQ/r. Electric potential is a scalar, and electric field is a vector. Addition of voltages as numbers gives the voltage due to a combination of point charges...Electric potential of a point charge is V=kQ/r. Electric potential is a scalar, and electric field is a vector. Addition of voltages as numbers gives the voltage due to a combination of point charges, whereas addition of individual fields as vectors gives the total electric field.
- https://phys.libretexts.org/Courses/Kettering_University/Electricity_and_Magnetism_with_Applications_to_Amateur_Radio_and_Wireless_Technology/04%3A_Potential_and_Field_Relationships/4.01%3A_Electric_Potential_from_Electric_FieldThe electric potential is different from the electric field, but the two quantities are related. In this section, we learn how to calculate the electric potential change along a path between two poin...The electric potential is different from the electric field, but the two quantities are related. In this section, we learn how to calculate the electric potential change along a path between two points from the electric field in that region of space.
- https://phys.libretexts.org/Courses/Georgia_State_University/GSU-TM-Introductory_Physics_II_(1112)/03%3A_Electric_Charge_and_Electric_Field/3.05%3A_Electric_Field-_Concept_of_a_Field_RevisitedIn this context, that means that we can (in principle) calculate the total electric field of many source charges by calculating the electric field of only q1 at position P, then calculate the fie...In this context, that means that we can (in principle) calculate the total electric field of many source charges by calculating the electric field of only q1 at position P, then calculate the field of q2 at P, while—and this is the crucial idea—ignoring the field of, and indeed even the existence of, q1.
- https://phys.libretexts.org/Bookshelves/College_Physics/College_Physics_1e_(OpenStax)/18%3A_Electric_Charge_and_Electric_Field/18.04%3A_Electric_Field-_Concept_of_a_Field_RevisitedContact forces, such as between a baseball and a bat, are explained on the small scale by the interaction of the charges in atoms and molecules in close proximity. They interact through forces that in...Contact forces, such as between a baseball and a bat, are explained on the small scale by the interaction of the charges in atoms and molecules in close proximity. They interact through forces that include the Coulomb force. Action at a distance is a force between objects that are not close enough for their atoms to “touch.” That is, they are separated by more than a few atomic diameters.
- https://phys.libretexts.org/Courses/Georgia_State_University/GSU-TM-Introductory_Physics_II_(1112)/04%3A_Electric_Potential_Energy_Electrical_Potential_or_Voltage_and_Capacitance/4.05%3A_Electrical_Potential_Due_to_a_Point_ChargeUsing calculus to find the work needed to move a test charge q from a large distance away to a distance of r from a point charge Q, and noting the connection between work and potential \((...Using calculus to find the work needed to move a test charge q from a large distance away to a distance of r from a point charge Q, and noting the connection between work and potential (W=−qΔV), we can define the electric potential V of a point charge: The potential on the surface will be the same as that of a point charge at the center of the sphere, 12.5 cm away. (The radius of the sphere is 12.5 cm.) We can thus determine the excess charge using Equation ???.
- https://phys.libretexts.org/Courses/Kettering_University/Electricity_and_Magnetism_with_Applications_to_Amateur_Radio_and_Wireless_Technology/02%3A_The_Electric_Field/2.04%3A_Electric_Fields_and_ForcesEach electric charge is associated with an electric field. The electric field only depends on the configuration and size of the source charges. Once the electric field is found, it allows us to calcu...Each electric charge is associated with an electric field. The electric field only depends on the configuration and size of the source charges. Once the electric field is found, it allows us to calculate the force on any test charge. The electric force between two point charges is described by Coulomb's Law.
