Magnetic Field

The magnetic field is the area around a magnet in which the effect of magnetism is felt. We use the magnetic field as a tool to describe how the magnetic force is distributed in the space around and within something magnetic in nature.

What is a magnetic field example?

This force causes the magnets to attract or repel one another. Examples of magnetic force is a compass, a motor, the magnets that hold stuff on the refrigerator, train tracks, and new roller coasters. All moving charges give rise to a magnetic field and the charges that move through its regions, experience a force.

Where is the magnetic field?

Earth's magnetic field (and the surface magnetic field) is approximately a magnetic dipole, with the magnetic field S pole near the Earth's geographic north pole (see Magnetic North Pole) and the other magnetic field N pole near the Earth's geographic south pole (see Magnetic South Pole).

What is magnetic field made of?

Magnetic fields are produced by moving electric charges. Everything is made up of atoms, and each atom has a nucleus made of neutrons and protons with electrons that orbit around the nucleus. Since the orbiting electrons ≠are tiny moving charges, a small magnetic field is created around each atom.

What is another name for magnetic field?

Alternate Synonyms for "magnetic field": magnetic flux; flux; field; field of force; force field.

How do magnetic fields work?

All magnets have north and south poles. Opposite poles are attracted to each other, while the same poles repel each other. When you rub a piece of iron along a magnet, the north-seeking poles of the atoms in the iron line up in the same direction. The force generated by the aligned atoms creates a magnetic field.

Why magnetic field is important?

Generated by the motion of molten iron in Earth's core, the magnetic field protects our planet from cosmic radiation and from the charged particles emitted by our Sun. It also provides the basis for navigation with a compass.

What is unit of magnetic field?

What is the unit of magnetic field? Magnetic field is denoted by B and H. The SI unit of H is amperes per metre and the SI unit of B is Newtons per metre per ampere or Teslas.

What uses magnetic field?

Computer hard drives use magnetism to store the data on a rotating disk. More complex applications include: televisions, radios, microwave ovens, telephone systems, and computers. An industrial application of magnetic force is an electromagnetic crane that is used for lifting metal objects.

Do humans have magnetic fields?

Today, two hundred years later, we know that the human body is indeed magnetic in the sense that the body is a source of magnetic fields, but this body magnetism is very different from that imagined by Mesmer.

Is Earth a magnetic field?

The crust of the Earth has some permanent magnetization, and the Earth's core generates its own magnetic field, sustaining the main part of the field we measure at the surface. So we could say that the Earth is, therefore, a "magnet."

What causes magnetic force?

The magnetic force is a consequence of the electromagnetic force, one of the four fundamental forces of nature, and is caused by the motion of charges. Two objects containing charge with the same direction of motion have a magnetic attraction force between them.

What carries magnetic field?

The force carrier for magnetic fields and electric fields are supposedly photons.

What if the Earth lost its magnetic field?

If Earth lost its magnetic field, there would be no magnetosphere - and no line of defense, even from weaker solar storms. Our power grids would be more vulnerable than ever, and even our computers and other electronics could suffer damage if a solar storm struck.

Why Earth has a magnetic field?

The magnetic field of Earth is caused by currents of electricity that flow in the molten core. These currents are hundreds of miles wide and flow at thousands of miles per hour as the earth rotates. The powerful magnetic field passes out through the core of the earth, passes through the crust and enters space.

What is the symbol for magnetic field?

Hence, the symbol for the magnetic field is 'B'.

What is the first function of magnetic field?

The first function of the Earth's magnetic field is to deflect the charged particles of the solar wind. This solar wind would otherwise strip the ozone layer from the upper atmosphere and leave the planet exposed to extreme levels of UV radiation.

How is magnetic field measured?

Put a material in a magnetic field. Run a current through this material. The magnetic field will create a "sideways" change in electric potential across the material - which you can measure. Using this change in potential and the size of the material, you get the magnitude of the magnetic field.

Where are magnetic fields strongest?

The magnetic field is strongest near the poles of the magnet. It is equally strong at both the poles. The magnetic field lines are closer near the poles. The strength of the magnetic field depends on how close the magnetic field lines are.

Why do magnets attract?

Unlike-poles attract: When a north pole and south pole point together, the arrows point in the SAME direction so the field lines can join up and the magnets pull together (attract).