Does an object in a magnetic field experience the buoyancy of a magnetic field

There is no magnetic field buoyancy.

You first have to know how magnetic fields work. The same poles repel each other, and the opposite poles attract.

How can there be magnetic buoyancy in a magnetic field? Of the four natural forces in the Grand Unified Theory, this is only an electromagnetic force. Electricity produces magnetism, and magnetic energy produces electricity. It doesn't produce any buoyancy at all, as you say. Buoyancy is essentially pressure and is also the category of gravity (gravitational force).

Physics is rigorous, not imaginary.

All the effect forces in our universe are a branch of these four forces (strong interaction, weak interaction, gravitational force, electromagnetic interaction, and all the forces known to mankind). Just like the elastic force, the frictional force is an electromagnetic force.

I guess I'm talking about it more profoundly, because you're still in junior high school, and you won't know it even when you reach high school. You have to distinguish between what forces are named according to the nature of the force and what are named according to the effect of the force.

Just like all the analysis in chemistry can be explained in physics. Chemistry is actually a branch of physics, but the research methods are different, and the essence is the same.

In a magnetic field, the moving charge is subject to the Lorentz force, and as for f=qvb (q is the amount of charge, v is the magnitude of velocity, and b is the strength of the magnetic field), as for the buoyancy of the magnetic field, it is not very clear.

Although it is said that the field is also a substance, basically speaking, the field is a substance that is different from the matter that we can see in general.

If you think about it, how does stress come about? Essentially, it should be a molecular contact or collision between two substances. However, the field is not made up of molecules, it is not even made up of the basic particles that make up the substance.

The field can be said to be the medium of force transmission, mathematically speaking, the field is just a kind of space with some special properties, physically speaking, the field has been divided into matter by scientists, but it is another substance that is different from the general matter, so do not think about it in terms of the properties of the general matter.

If it is a magnet, it has an S pole and an N pole, the S pole of the magnet corresponds to the N pole of the external magnetic field, and the N pole corresponds to the S pole of the external magnetic field. Then find the resultant force of the force generated by the external S and N poles on the magnet, and the direction of the resultant force is the direction of the force on the magnet.

Extend your left hand and spread it so that your thumb is perpendicular to the other four in the same plane. Imagine passing the magnetic line through the palm of your hand, pointing your four fingers in the direction of the current, and pointing your thumb to the force or movement.

The formula is f=bil b is the magnetic induction intensity, i is the magnitude of the current, and l is the length of the conductor in the magnetic field.

Simple definition: A magnetic field exists in the space where magnetic forces can be generated. Magnetic field is a special substance. There is a magnetic field around the magnet, and the interaction between the magnets is mediated by the magnetic field. ）

An electric current, a moving charge, a magnet, or a special form of matter that exists in the space around the changing electric field. Since the magnetism of the magnet is the same as the current, the current is the movement of the electric charge, so in a nutshell, the magnetic field is generated by the moving charge or the changing electric field. The basic characteristic of a magnetic field is that it exerts a force on a moving charge, from which the magnetic field acts on an electric current, on a magnet, or as a moment.

Similar to the electric field, the magnetic field is a vector field that is continuously distributed in a certain spatial area, and the basic physical quantity describing the magnetic field is the magnetic induction intensity vector.

b, magnetic field lines can also be used.

Image map. However, as a vector field, the nature of the magnetic field is quite different from that of the electric field. The magnetic field produced by a moving charge or a changing electric field, or the total magnetic field of the sum of both, is a vector field with passive spin, and the magnetic field lines are a closed family of curves, uninterrupted, and non-crossing.

In other words, there is no source of emitting magnetic field lines in the magnetic field, and there is no tail of converging magnetic field lines, and the closure of the magnetic field lines indicates that the loop integral along the magnetic field lines is not zero, that is, the magnetic field is a rotational field instead of a potential field (conservative field), and there is no scalar function similar to the electric potential.

Electromagnetic field. It is the medium of electromagnetic action, it is a unified whole, the electric field and the magnetic field are its two sides that are closely related and interdependent, the changing electric field produces the magnetic field, the changing magnetic field produces the electric field, and the changing electromagnetic field propagates in space in the form of waves. Electromagnetic wave.

Propagation at a finite velocity, with exchangeable energy and momentum, the interaction between electromagnetic waves and physical objects, the mutual transformation of electromagnetic waves and particles, etc., all prove that the electromagnetic field is an objectively existing substance, and its "specialness" lies only in the absence of static mass.

The magnetic phenomenon is one of the earliest physical phenomena recognized by humans, the compass.

It is a great invention in ancient China. Magnetic fields are widespread on Earth, stars (such as the Sun), galaxies.

Such as the Milky Way, planets, moons, and interstellar space.

and intergalactic space, both have magnetic fields. In order to understand and explain many of these physical phenomena and processes, the magnetic field must be taken into account. In modern science and technology and human life, magnetic fields can be encountered everywhere, generators, motors, transformers, telegraphs, radios, accelerators, thermonuclear fusion devices, electromagnetic measuring instruments, etc. are all related to magnetic phenomena.

Even in the human body, along with the life activities of the skin, some tissues and organs will produce a faint magnetic field.

Direction of magnetic field: The direction of the magnetic field force at a point in the magnetic field of the north pole of the small magnetic needle is specified as the direction of the electromagnetic field.

Magnetic field lines: Draw some curves in the magnetic field so that the tangent of any point on the curve.

The direction is the same as the direction of the magnetic field at this point, and these curves are called magnetic field lines. The magnetic field lines are closed curves. The direction in which the north pole of the small magnetic needle points is specified as the direction of the magnetic field lines.

The magnetic field lines around the magnet come out from the n pole and enter the s pole, and the magnetic field lines inside the magnet go from the s pole to the n pole.

Because magnets have two forms, homogeneous repulsion and opposite-sex attraction, there are two corresponding forms of maglev trains: one is the maglev train designed by using the principle of magnet homogeneous repulsion, which uses the repulsion force generated between the magnetic field formed by the superconductor electromagnet on the car and the magnetic field formed by the track coil to make the car body levitate the railway; The other is the magnetic levitation train designed by using the principle of magnet opposite-sex attraction and electrodynamic operation of the nuclear system, which is to install magnets at the bottom of the car body and the top of the reverse rotation on both sides, and set up the reaction plate and the induction steel plate respectively above the T-shaped guide rail and below the outrigger part, control the current of the electromagnet, keep a gap of 10-15 mm between the electromagnet and the guide rail, and make the attraction of the guide rail steel plate and the gravity of the vehicle balanced, so that the car body is suspended on the guide rail surface of the lane to run.

At present, it is all electricity.

And it's a lot of electricity.

But compared to coal and oil.

Electricity is already very environmentally friendly.

But the maglev orbit produces radiation.

There is a certain influence on the surrounding residents and the environment.

So all of them are currently in the trial operation stage.

And the cost is also expensive.

Basically, it is 300 yuan per centimeter of people's clear wheel coins (including only tracks) to be satisfied.

Because all visible objects are made up of molecules or atoms. If you go deeper into the microscopic level, you will find that objects are nothing but the construction of molecular atoms, elastic force is the force between molecular atoms, and frictional force is also the force between molecular atoms.

As for buoyancy? Buoyancy is essentially elastic force, and if you go deeper into the microscopic level, you will find that buoyancy is also a force between molecular atoms.

The force between the atoms of a molecule is generated by the electromagnetic force between the positively charged nucleus and the negatively charged electrons inside.

According to the current statement, there are four types of force, namely: strong force, weak force, electromagnetic force, and gravitational force (there are different opinions on whether gravitational force is a force or not, or it is just a curvature of space-time).

Among them, the range of strong force and weak force belong to short-range force, and the scale of action is the range of atomic nucleus. The force between atoms is mainly the electromagnetic force (gravitational force is negligible at the microscopic scale).

Elastic force, frictional force, and buoyancy force are all based on the attraction or repulsion of interatomic forces, so they are electromagnetic forces.

I'll be brief.

1) There are two kinds of substances in nature (existence is matter): one is "visible, grindable, and can be held", which is called physical objects, such as large objects and small molecular atoms. Another kind of field, such as electric field and magnetic field, is generally "invisible, intangible, intangible, and uncontrollable", in fact, light is an electromagnetic field, which can be seen!

They are not made of molecular atoms, but they exist objectively, have energy, and can move, so they are also called "matter".

2) There is this invisible and intangible substance - the magnetic field around the magnet or electric current.

3) The magnetic field has a strong effect on the magnetic pole placed in it, and it is directional, because the direction of the magnetic field is different, and because the N s pole of the magnetic pole placed in it is the same, the direction of force may be different.

4) When the two magnetic poles of A and B interact, it is actually the magnetic field of A exerting force on B, and at the same time, the magnetic field of B also exerts force on A.

Elastic force, frictional force, buoyancy force all belong to electromagnetic interactions.

Think of it this way: there are four basic interactions, strong and weak interactions, which occur in the nucleus, and these three forces are not gravitational forces, but can only be electromagnetic interactions.

In fact, buoyancy is the difference between the upward and downward "pressure" of a liquid (or gas) on an object, and the pressure belongs to electromagnetic interaction, so buoyancy belongs to electromagnetic interaction.

Elasticity, friction, buoyancy [not] electromagnetic force!

Answer B Analysis: To answer this question, you should grasp that the nature of the magnetic field has a strong effect on the magnetic pole or energized conductor that Sakura puts into it

Answer: The nature of the magnetic field is to have a strong effect on the magnetic pole or energized conductor placed in it, but if there is no current in the wire, the magnetic field is not affected by the magnetic field force, so a, c, d are wrong, b is correct;

Therefore, choose b point ruler old comment: This question examines the nature of the magnetic field, and it should be remembered that the magnetic field of the trap bush only has a strong effect on the magnetic pole and the energized conductor