- What is the strongest magnetic material?
- Why can’t magnetic field lines cross?
- What is J in electromagnetism?
- What is BH curve?
- Which unit is Tesla?
- Why do magnetic fields exist?
- Can you block a magnetic field?
- What is difference between B and H in magnetism?
- What is H field?
- What is B and H in BH curve?
- Where is magnetic field strongest?
- Can we use the Earth’s magnetic field to generate electricity?
- Why is the symbol for magnetic field B?
- What does Faraday’s law mean?
- Can we see magnetic flux lines?
- What is electromagnetic Sigma?
- What is relation between B and H?
- What is H in electrodynamics?
What is the strongest magnetic material?
neodymium magnetsDeveloped independently in 1984 by General Motors and Sumitomo Special Metals, neodymium magnets are the strongest type of permanent magnet available commercially..
Why can’t magnetic field lines cross?
Magnetic field lines can never cross, meaning that the field is unique at any point in space. Magnetic field lines are continuous, forming closed loops without beginning or end. They go from the north pole to the south pole.
What is J in electromagnetism?
The current density vector j is the vector whose magnitude is the electric current density, and whose direction is the same as the motion of the positive charges at M. … For example, for charge carriers passing through an electrical conductor, the area is the cross-section of the conductor, at the section considered.
What is BH curve?
by Lipeng Liu. November 26, 2019. The B-H curve is generally used to describe the nonlinear behavior of magnetization that a ferromagnetic material obtains in response to an applied magnetic field.
Which unit is Tesla?
magnetic flux densityThe tesla (symbol T) is the derived SI unit of magnetic flux density, which represents the strength of a magnetic field. One tesla represents one weber per square meter.
Why do magnetic fields exist?
Magnetic fields occur whenever charge is in motion. As more charge is put in more motion, the strength of a magnetic field increases. Magnetism and magnetic fields are one aspect of the electromagnetic force, one of the four fundamental forces of nature.
Can you block a magnetic field?
There is no known material that blocks magnetic fields without itself being attracted to the magnetic force. Magnetic fields can only be redirected, not created or removed. To do this, high-permeability shielding alloys are used. The magnetic field lines are strongly attracted into the shielding material.
What is difference between B and H in magnetism?
B is related to the properties of the material and its relation to the applied excitation. In summary different units but the same in a vacuum. In a material with a magnetization B type magnets of magnetic field lines that are solenoidal while H have irrotational field lines.
What is H field?
Electromagnetic waves are made up of Electric Fields (often called the E-field) and Magnetic fields (also known as H-fields). What is an H-field? The H-field is a vector quantity (has a magnitude and direction) and is measured in Amps/Meter [A/m]. Recall that the E-field points away from a positive point charge.
What is B and H in BH curve?
B-H curve is used to show the relationship between magnetic flux density (B) and magnetic field strength (H) for a particular material. When tested experimentally, a ferromagnetic (i.e. strongly magnetic) material such as iron will produce a curve similar to that shown above.
Where is magnetic field strongest?
Bar Magnet As can be visualized with the magnetic field lines, the magnetic field is strongest inside the magnetic material. The strongest external magnetic fields are near the poles. A magnetic north pole will attract the south pole of another magnet, and repel a north pole.
Can we use the Earth’s magnetic field to generate electricity?
Actually, it’s possible to use the Earth’s magnetic field to generate electricity. A satellite in the form of large diameter loop in orbit around the Earth will generate a current in that loop, and could be used to power something, but at the cost of a rapidly degrading orbit.
Why is the symbol for magnetic field B?
Originally Answered: Why do we take B as the symbol for magnetic field induction? It looks like Maxwell used B for first time to represent magnetic flux density. Still it is continuing.
What does Faraday’s law mean?
Faraday’s law of induction (briefly, Faraday’s law) is a basic law of electromagnetism predicting how a magnetic field will interact with an electric circuit to produce an electromotive force (EMF)—a phenomenon known as electromagnetic induction.
Can we see magnetic flux lines?
At each end of a magnet is a pole. These lines of flux (called a vector field) can not be seen by the naked eye, but they can be seen visually by using iron fillings sprinkled onto a sheet of paper or by using a small compass to trace them out.
What is electromagnetic Sigma?
In electromagnetism, charge density is the amount of electric charge per unit length, surface area, or volume. … Surface charge density (σ) is the quantity of charge per unit area, measured in coulombs per square meter (C⋅m−2), at any point on a surface charge distribution on a two dimensional surface.
What is relation between B and H?
The H-field In addition to B, there is a quantity H, which is often called the magnetic field. In a vacuum, B and H are proportional to each other, with the multiplicative constant depending on the physical units. Inside a material they are different (see H and B inside and outside magnetic materials).
What is H in electrodynamics?
Electromagnetic fields are divided into four different quantities: the magnetic flux density B with the unit T (Tesla or volt-second per square meter) the magnetic field intensity H with the unit A/m (Ampere per meter)