The magnetic field inside a conductor with uniform current density J
= I/πR
2
can be found with Ampere’s Law. Inside the conductor the magnetic field B increases linearly with r. Outside the conductor the magnetic field becomes that of a straight conductor and decreases with radius.
Why magnetic field inside a conductor is not 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.
What is the magnetic field inside a perfect conductor?
In perfect conductors, the interior magnetic field
must remain fixed but can have a zero or nonzero value
. In real superconductors, all magnetic flux is expelled during the phase transition to superconductivity (the Meissner effect), and the magnetic field is always zero within the bulk of the superconductor.
Is there current inside a conductor?
The
electric field inside an ideal conductor will be zero when under static conditions
. In this case, a current can flow without an electric field present inside the conductor.
Is magnetic field inside a conductor 0?
Any external field applied to a perfect conductor will have no effect on its internal field configuration.
The interior magnetic field is zero
while the surface magnetic field is perpendicular to both the current density and the surface normal.
What is J in magnetic field?
The
symbol of magnetic polarization
is J, the associated Unit T (Tesla). Magnetic polarization occurs when an external magnetic field is applied to a material with elementary magnets. … A magnetic flux density B, which is μ larger than in a vacuum, i.e. Ferromagnets increase the magnetic flux density.
What is H in magnetic field?
The definition of H is
H = B/μ − M
, where B is the magnetic flux density, a measure of the actual magnetic field within a material considered as a concentration of magnetic field lines, or flux, per unit cross-sectional area; μ is the magnetic permeability; and M is the magnetization. …
Is there an electric field in a perfect conductor?
In a perfect conductor, electric charges are free to move without any resistance to their motion. … Since electric fields create forces on electric charges,
there cannot be static electric fields present
inside perfect conductors.
Is a perfect conductor lossless?
Conductivity represents power loss within a material. A material is known as
“lossless” if the conductivity is zero ( =0)
. Materials like air and vacuum (space) have no conductivity. … In textbooks, these materials are often referred to as PEC (perfect electric conductors), so that the conduction loss can be ignored.
Can a static magnetic field exist in a good conductor?
The electric and magnetic components must exist together. In terms of statics, a
magnetic field can exist in a perfect electrical conductor
although I think one may argue that such a state is a bit ill-posed.
What is the magnetic field inside the solenoid?
Inside a solenoid the magnetic field lines will be straight lines and the field will be strong. Outside the solenoid the magnetic field will be weak and the field lines will curl up to form closed loops. Hence, the magnetic field inside a solenoid
will be uniform
.
What is the magnetic field inside a hollow cylinder?
(2) Inside the hollow cylinder : Magnetic field inside the hollow cylinder
is zero
.
Does current carrying wire produces electric field?
As we know that a current carrying conductor, such as a metal wire will produce a
magnetic field
around it, the motion of charge around the wire in the form of concentric circles. … So, the conductor does not induce any electric field around itself. However, a magnetic field is produced in the surroundings.
Can electric field inside a conductor be non zero?
Can the electric field inside a conductor be non zero? The answer is NO.
Electric field inside a conductor is always zero
. Reason: The electricity conducting free electrons are only present on the external surface of the conductor.
Is the electric field inside an insulator zero?
Inside a conductor the potential V is constant and the surfaces of a conductor are an equipotential. In an insulator charges cannot move around, and the charge density can have any form. If ρ(r) = 0, the potential is non-uniform, and
E = 0 inside the insulator
.
Are there electric fields inside wires?
Although a wire is a conductor,
there is no electric field in it just because it is capable of conducting current
! If you connect a battery to the ends of the wire, the battery voltage creates an electric field that, in deed, causes the electrons in the wire to move and try to “neutralize” the electric field.
