Can there be a magnetic field inside a conductor?
The magnetic field inside a conductor with uniform current density J = I/πR2 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.
Is there magnetic field outside a coaxial cable?
So inside of the outer cylindrical shell, the magnetic field magnitude is going to be equal to this quantity. And this is the magnetic field generated outside of this coaxial cable. That is for the region that r is greater than c.
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.
Why magnetic 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.
Why is the magnetic field outside a coaxial cable zero?
Because the outer conductor carries the same current as the inner one does (Figure 8.5), there is also zero magnetic field. An electromagnetic wave propagates in the annular region between the two coaxial conductors, and there is zero field outside.
What is J in magnetic field?
The symbol of magnetic polarization is J, the associated Unit T (Tesla). A magnetic flux density B, which is μ larger than in a vacuum, i.e. Ferromagnets increase the magnetic flux density.
Why is electric field uniform?
The force on the charge is the same no matter where the charge is located between the plates. This is because the electric field is uniform between the plates.
How is the magnetic field in a coaxial cable determined?
In the inner conductor is varies as and in the outer cable as . Where I is the current through any surface which has the curve of the LHS as boundary. a) We consider a circle of radius centered at the central axis of the coaxial cable in the plane perpendicular to the current.
Where are the conductors in a coaxial cable?
These cases are inside the inner conductor, inside the space between two conductors, inside the thickness of outer conductor, outside the outer conductor. A coaxial cable consists of two conductors; one is inner conductor made up of either copper or aluminum and an outer conductor of metal foil. Both the conductors are separated by an insulator.
How is ampere’s law applied to coaxial cable?
Physics Ninja applies Ampere’s law to calculate the magnetic field in a coaxial cable. The inner and outer conductors carry current in opposite directions. Subscribe Here: https://www.youtube.com/c/OnlinePhysi… Loading…
What is the B field of a coaxial cable?
B field of a coaxial cable. A coaxial cable consists of two concentric cylindrical regions, an inner core, an outer cylindrical shell, something like this.
