Class 12PhysicsElectric Potential and CapacitanceRelation between Electric Field and Potential and Potential Gradient
MediumIf the potential energy of an electron and a proton at a distance $r$ is given by the formula $U = - \left( \frac{ke^2}{3r^3} \right)$,then which law of force applies?
- A$F = \frac{ke^2}{r^2}$
- B$F = - \frac{3}{4} \frac{ke^2}{r^4}$
- C$F = - \frac{ke^2}{r^4}$
- D$F = \frac{ke^2}{r}$
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