A surface is called equipotential if every point on the surface has same potential. … Each point above the surface of the sphere is located at a distance of r from the center. So, the electric potential V is same for every point on the sphere. Because electric potential depends only on the distance from the charge.
What does it mean that all the points on an equipotential line have the same potential?
Since the electric field lines point radially away from the charge, they are perpendicular to the equipotential lines. … The potential is the same along each equipotential line, meaning that no work is required to move a charge anywhere along one of those lines.
What is the relationship between electric field lines and equipotential surfaces?
Electric field lines begin on positive charges and radiate away from them toward negative charges, where they terminate. 3. Equipotential lines are lines connecting points of the same electric potential. All electric field lines cross all equipotential lines perpendicularly.
Why are electric field lines perpendicular to equipotential surface?
An equipotential surface is circular in the two-dimensional. Since the electric field lines are directed radially away from the charge, hence they are opposite to the equipotential lines. Therefore, the electric field is perpendicular to the equipotential surface.
Why equipotential lines and electric field lines are mutually at right angles?
The lines of electric force must be at right angles to equipotential lines because the entire electric field is in electrostatic equilibrium and so the combination of all the forces in the field must be equal to zero and so the electric force must be perpendicular to the equipotential lines.
Where do you need to be to experience zero electric potential?
We know: The total potential at the point will be the algebraic sum of the individual potentials created by each charge. If you place the -1 C charge 1 cm away from the point then the potential will be zero there.
Why can’t electric field lines cross?
Electric field lines cannot cross. … This is because they are, by definition, a line of constant potential. The equipotential at a given point in space can only have a single value. If lines for two different values of the potential were to cross, then they would no longer represent equipotential lines.
Where is the electric field the strongest?
The field is strongest where the lines are most closely spaced. The electric field lines converge toward charge 1 and away from 2, which means charge 1 is negative and charge 2 is positive.
Can an electric field lines begin and end on the same conductor?
But objects at electrostatic equilibrium have no further motion of charge about the surface. … The electric field lines either begin or end upon a charge and in the case of a conductor, the charge exists solely upon its outer surface.
Why electric field inside a conductor is zero?
Due to a large number of electrons, the force of repulsion acting in between them is also very high. Hence in order to minimize the repulsion between electrons, the electrons move to the surface of the conductor. Hence we can say that the net charge inside the conductor is zero.
Is true for electric lines force?
The statement is true because tangent in the path of electric field lines gives us the direction of the electric field at that point. In case the lines cut each other, it means that there will be 2 directions on the electric field, which is impossible.
What is the angle between the surface of a conductor and the electric field lines?
Electric field lines start and end at 90 degree at the surface of the conductor.