Chapter 2 physics 12 (a)
- 3. It is a scalar quantity. Its SI unit is J (Joule) & electron volt (eV). 1 electron volt is defined as kinetic energy gained or lost by electron in moving through a potential difference of 1 volt. 1 eV = 1.6 × 10-19J
- 6. Electric Potential due to single charge
- 8. Equipotential Surfaces • Regions in space where electric potential has constant value over a particular charge distribution is called equipotentials. • The 3D space in which potential have constant value is called as equipotential surface & 2D place where potential again has constant value is called as equipotential lines. • They are always represented in form of concentric spheres or lines around the body depending on its dimension. • These equipotential lines or surface are always drawn perpendicular to that of electric field lines. • Some of equipotential surfaces are shown below:-
- 9. • Equipotential surface due to opposite charges • Equipotential surface due to similar charges
- 10. Relation between electric field & electric potential
- 11. Electrostatic Potential Energy • It is defined as minimum work required to be done by external force in moving without acceleration a test charge q between any two points. • Consider a system of two charges q1 & q2. suppose q1 is fixed & q2 is moved from point A to B then •
- 12. Always remember that while using this expression in numericals sign present on the charges should be used accordingly.