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 If lines for two different values of the potential were to cross, then they would no longer represent equipotential lines.
(a) Is it possible for an electric field to exist at point A in empty space? Yes. The positive charges create electric fields that extend in all directions from those charges. The total field at point A is the vector sum of the individual fields produced by the charges at that point.
Electricity doesn't exist in space in the usual way we think about it, namely electrons flowing in a wire. But that's only because space normally doesn't have wires. These charged electrons and ions interact with each other (opposite charges attract) and with the magnetic field of the Sun.
No, an electric charge cannot exist in a vacuum. Electric charge is associated with charged particles, and if they existed in some part of space it wouldn't be a vacuum.
Think of one charge as producing an electric field everywhere in space. The force on another charge introduced into the electric field of the first, is caused by the electric field at the location of the introduced charge.
What is Electric Field Intensity? The space around an electric charge in which its influence can be felt is known as the electric field. The electric field intensity at a point is the force experienced by a unit positive charge placed at that point.
In vector calculus notation, the electric field is given by the negative of the gradient of the electric potential, E = −grad V. This expression specifies how the electric field is calculated at a given point. Since the field is a vector, it has both a direction and magnitude.
No, it is not possible for a magnetic field to exist without an electric field.
Twenty years ago, astronomers started to detect magnetism permeating entire galaxy clusters, including the space between one galaxy and the next. There, they discovered the largest magnetic field yet: 10 million light-years of magnetized space spanning the entire length of this “filament” of the cosmic web.
The direction of the
magnetic field is indicated by lines. While the
electric fields are generated around the particles which obtain
electric charge.
Difference Between Electric Field And Magnetic Field.
| Difference Between Electric Field vs Magnetic Field |
|---|
| Electric Field | Magnetic Field |
|---|
| Proportional for the electric charge | Proportional to the speed of electric charge |
Does a compass work on the Moon? On Earth, a compass needle points to the North Magnetic pole. But on the Moon, Mr. Dietrich said, ''there is no magnetic field that would be detectable by your average Earth compass.
Light and electricity don't seem to have much trouble passing through water. It doesn't seem like it would be magnetic but it turns out water, and all matter, can exhibit magnetic properties if you put them in a big enough magnetic field. Water is slightly repelled by a very strong magnet.
As Ampere suggested, a magnetic field is produced whenever an electrical charge is in motion. The spinning and orbiting of the nucleus of an atom produces a magnetic field as does electrical current flowing through a wire. The direction of the spin and orbit determine the direction of the magnetic field.
Your field can then be described as E=Ez(x,y,z)ˆz. As an electrostatic field, this must satisfy Gauss's law, which in vacuum reads ∇⋅E=∂Ez∂z=0, and means Ez cannot depend on the z coordinate. More intuitively, the electric field cannot change its magnitude along its direction in the absence of electric charge.
The net electric field inside a conductor is zero. Therefore, the electric field lines do not pass through a conductor.
A "spark" is the consequence of electricity flowing through a medium, like air, and exciting atoms in that medium so that they emit visible light. You can pass electricity through a vacuum, as a stream of charged particles, but there won't be a spark.
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.
