Electric field is defined as the gradient of potential and the surface of a conductor has a constant potential. Therefore, there is no field along the surface of the conductor and hence the electrostatic field at the surface of a charged conductor should be Normal to the surface at every point.
Why electric field lines near the surface is perpendicular to the surface?
The mutual repulsion of excess positive charges on a spherical conductor distributes them uniformly on its surface. The resulting electric field is perpendicular to the surface and zero inside.
Why are electric field lines perpendicular to the surface of a conductor Class 12?
So that the electrostatic field inside the conductor is zero. In the static situation, no excess charges will be present inside the conductor. … To get equipotential or constant potential throughout the surface, electrostatic field lines have to be perpendicular to the segments of the conductor.
Are electric field lines always perpendicular to the surface?
The electric force, and thus the electric field, is always directed perpendicular to the surface of an object. … This occurs when drawing electric field lines for configurations of two or more charges as discussed in the section below.
Why is electric field discontinuous across the surface of a conductor?
The magnitude of the electric field due to a charged spherical shell is zero inside it, maximum on its surface and then keeps decreasing as 1/r2. So the value of electric field does not vary smoothly from r = 0 to r = ? and thus it is discontinuous.
Why electric field lines do not pass through conductor?
The net electric field inside a conductor is zero. Therefore, the electric field lines do not pass through a conductor.
Why are the field lines not parallel with the Earth’s surface at all points?
the earth’s magnetic field is not always parallel to the surface of the earth-it may have a component perpindicular to the earths surface. the compass will tend to line up with the local direction of the magnetic field, so one end if the compass will dip downward.
When the electric field vector is perpendicular to the surface?
If the surface is perpendicular to the field (left panel), and the field vector is thus parallel to the vector, →A, then the flux through that surface is maximal. If the surface is parallel to the field (right panel), then no field lines cross that surface, and the flux through that surface is zero.
Can electric field lines go through a conductor?
As they’ve explained, electric field lines cannot pass through the conductor for then E will either form a closed loop (cannot happen cause curl E=0) or it will pass from the inner surface to the outer and there will be potential difference which is a contradiction (Conductors have equipotential surfaces).
Why electric field lines are perpendicular to the charge?
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.