Physics 22.5 Point Charges Flashcards
1
Q
What is the equation for the electric field strength on a point charge?
A
E=(Q/(4πε0r^2))
- E is the electric field strengh in Newtons per coulomb [N C^-1]
- Q is the charge of the charge creating the field in coulombs [C]
- ε0 is the permittivity of free space in farads per metre [F m^-1]
- r is the separation of the charges from their centres in metres [m]
2
Q
What is the resultant electric field strength?
A
The resultant electric field strength is the vector sum of the individual electric field strengths
