level: Level 1
Questions and Answers List
level questions: Level 1
| Question | Answer |
|---|---|
| what is electric potential difference? | The potential difference between two point is equal to the work done per unit charge in moving charges between two point. ΔV=V B-VA=W AB /q 0 =ΔU/q 0 |
| what is electric potential? | Work done to bring a unit charge from infinity to a point. U = 1/ (4πε o) × [q 1 q 2 /d] |
| Why do we introduce electric potential ? | If you know the electric field in the space, then you can predict everything that happen with a charge in that field. |
| Who need equipotential surface if we have electric field everywhere? | There are example where electric field are so incredibly comlicated that it is easier to work with equipotential becouse the change in kinetic energy really depend in change in potential when you go from one point to another |
| electric potential due to a point charge? | V = kQ/ r |
| electric potential due to a uniform charge ring ? | v=kQ√x^2 + a^2 |
| potential due to an electric dipole at axis depend on? | the distance r of the point from the dipole. V=KP/x^2 |
| electric potential at perpendicular bisector of dipole? | V=0 |
| electric potential at any general point in dipole ? | V = KPCosθ/r^2 |