\[V=k\frac{q}{r}\]
Variables
Velectric potential (V)
kCoulomb constant (N*m^2/C^2)
qpoint charge (C)
rdistance from charge (m)
Description
What is this formula?
This formula calculates the electric potential generated by a point charge at a given distance.
When to use it
Use it when analyzing electric potential energy and voltage distributions around isolated charges.
Example
Data:
k = 8.99e9 N*m^2/C^2
q = 3e-6 C
r = 0.50 m
Formula:
V = k*q/r
Substitution:
V = (8.99e9*3e-6)/0.50
Result:
V = 5.39e4 V
Applications
Electrostatics, capacitor analysis, electric potential mapping, particle physics, and electrical engineering.