gneill said:What equation is relevant for finding the electric potential at some distance from a point charge?
V=keq/rgneill said:What equation is relevant for finding the electric potential at some distance from a point charge?
Okay, I presume you meanrrosa522 said:V=keq/r
The formula for calculating the electric potential at the midpoint is V = kq/r, where V is the electric potential, k is the Coulomb's constant, q is the charge of the source, and r is the distance from the midpoint to the source.
The direction of the electric potential at the midpoint can be determined by considering the direction of the electric field at that point. The electric potential is in the direction of the electric field lines, which are directed away from positive charges and towards negative charges.
Yes, the electric potential at the midpoint can be negative. This occurs when the source charge is negative, as the negative charge repels negative charges and attracts positive charges. The electric potential is negative when moving towards the source and positive when moving away from the source.
The electric potential at the midpoint is inversely proportional to the distance from the source. This means that as the distance increases, the electric potential decreases. This relationship is described by the formula V = kq/r, where r is the distance from the midpoint to the source.
The SI unit for electric potential is volts (V). However, other commonly used units include joules per coulomb (J/C) and electronvolts (eV). The choice of unit depends on the scale of the electric potential being measured.