WAEC - Physics (1992 - No. 50)
What is the electric potential at a point distance r from a proton of charge q placed in a medium of permittivity εo?
q2/4πεor2
q/4πεor2
q2/4πεor
q/4πεor
4πεoq2r
Vysvětlení
The general formula for calculating electrical potential V = \(\frac{\text{W}}{\text{q}}\)
For a point charge V = \(\frac{\text{kQ}}{\text{r}}\) = \(\frac{\text{Q}}{4\pi \varepsilon_o r}\)