All Flashcards
How do you calculate total electric potential energy for multiple charges?
Calculate the potential energy for every unique pair of charges and then sum them up.
What is the first step to solving an electric potential energy problem?
Draw a diagram of the charge configuration.
Differentiate between positive and negative electric potential energy.
Positive: Like charges, requires work to bring together. Negative: Unlike charges, attract each other, requires work to separate.
How is electric potential energy related to electric potential (voltage)?
Electric potential energy is the energy a charge has due to its position in an electric field; related to electric potential (voltage) by .
Define Electric Potential Energy.
Work done by an external force to bring charges from infinitely far apart to their current positions; stored energy ready to do work.
What is in the context of Electric Potential Energy?
Electric potential energy, measured in Joules (J).
Define 'q' in the Electric Potential Energy formula.
The charge of an object, measured in Coulombs (C).
What is 'r' in the Electric Potential Energy formula?
The distance between the charges, measured in meters (m).
Define Coulomb's constant (k).
A constant equal to N⋅m²/C² or .
Define .
Permittivity of free space constant ( C²/N⋅m²).