Electric Potential and Capacitors — Chapter Summary

Electric potential at any point

Electric potential at any point in an electric field is defined as the work done against the electric force in moving a unit positive charge from infi

Potential difference between two points

Potential difference between two points A and B is defined as V_AB = V_B - V_A = W_AB/q₀, where W_AB is the work done in moving test charge q₀ from A

For an electric dipole with dipole

For an electric dipole with dipole moment p = q × 2l, the potential at a point P at distance r and angle θ from the axis is: V = (p cosθ)/(4πε₀r²). Th

An equipotential surface is a surface

An equipotential surface is a surface on which every point has the same electric potential. Key properties: (1) No work is done in moving a charge fro

The electric field at any point

The electric field at any point is equal to the negative rate of change of potential with distance (called potential gradient) in the direction of the