What is electromagnetic field strength and its direction

In the electric field, we specify the force exerted on a particle with a unit charge in that field strength as the electric field strength.

Abbreviated as field strength e=f q direction is the direction of force of the positive charge at the point is the direction of the field strength at the point, in the magnetic field, we specify a very short wire and the current intensity.

is i, the force at a point in the magnetic field The magnetic induction intensity is b=f il, and the direction is judged by the left-handed rule.

The strength of the electromagnetic field is the density of the magnetic field lines, the denser the intensity, because the magnetic field lines are the densest near the magnetic pole, the magnetic field strength is the largest, the direction is from the n pole to the s pole, and the inside is from s to n

It's all moving from more to less. That dense field strength is greater. The opposite is small.

The relationship between the strength of the magnetic field and the current is h=n i le.

The formula for the relationship between roughness and current in the strong attitude of the magnetic field is h=n i le, where h is the strength of the magnetic field and the unit is a m. n is the number of turns of the excitation coil; i is the excitation current, the unit is a; LE is the effective magnetic circuit length of the test sample in m. Magnetic field is a physical concept, which refers to the field that transmits the magnetic force between physical objects; Moreover, the magnetic field is a special substance that cannot be seen or touched; And the magnetic field is not composed of atoms or molecules, but the magnetic field is objectively present and has the radiative properties of wave particles.

Difference Between Magnetic Field Strength and Magnetic Induction Intensity:

1. The magnetic field strength is represented by H, and the magnetic induction intensity is represented by B.

2. Both can describe the strength and direction of the magnetic field, and both are related to the current and distribution of the excitation magnetic field. However, the magnetic field strength is independent of the magnetic field medium, whereas the magnetically induced strong track ballast is related to the magnetic field medium.

3. The unit of magnetic induction intensity is t (Tesla), and the unit of magnetic field strength is a m (am).

4. In the qualitative description of the magnetic field, the magnetic induction intensity is mostly used, and the magnetic field strength is mostly used in the calculation of the magnetic field, which is linearly related to the current. <>

The [magnetic field direction] at a certain point in a magnetic field is the [magnetic induction intensity direction], that is, the [tangent direction of the magnetic inductance line] through the point, and there is no difference between the three, and the direction is the same.

Remember: In order to describe the action of the magnetic field, people describe the magnetic field as magnetic inductance lines, and the tangent of the magnetic inductance lines at a certain point is the direction of the magnetic field and the direction of the magnetic induction intensity.

Magnetic Induction Intensity]: A basic physical quantity that describes the strength and direction of the magnetic field. is a vector, often represented by the symbol b.

Magnetic field direction]: Suppose the small magnetic needle is placed in the magnetic field of the magnet, and the small magnetic needle is affected by the magnetic field, and its poles point to a certain direction when it is stationary. At different points in the magnetic field, the small magnetic needle does not necessarily point in the same direction when it is stationary.

This fact shows that the magnetic field is directional, and we agree that at any point in the magnetic field, the direction of force at the north pole of the small magnetic needle is the direction of the magnetic field at that point.

Inductive Magnetic Line]: It is a virtual line used to describe the direction of the magnetic field, and does not actually exist.

In vacuum, the physical quantity that describes the strength of the magnetic field is the magnetic induction intensityb, in the medium, an auxiliary physical quantity needs to be introducedh, which is called the strength of the magnetic field, and the relationship between the two isb=h, is the magnetic permeability of the medium.

Hello, it is a pleasure to serve you and give you the following answer: The direction of magnetic induction intensity and electric field strength refers to the direction of their magnetic and electric fields. The direction of the magnetic induction intensity and the electric field strength is affected by the magnetic and electrical properties of the object, and their direction can be represented by magnetic field lines and power lines.

A magnetic field line is a line that departs from a magnetic pole and wraps along a magnetic field line, and a power line is a line that departs from an electrode and wraps along an electric field line. If the direction of the magnetic induction strength and the electric field strength is not correct, it may lead to circuit failure, affect the function of electronic equipment, and may even lead to fire. Workaround:

1.First of all, the magnetic and electrical objects in the circuit should be examined to determine their magnetic and electrical properties to determine the direction of the magnetic induction intensity and the electric field intensity. 2.

Then, a magnetometer or power meter is used to measure the direction of the magnetic induction intensity and the electric field strength to determine if they are correct. 3.If the direction of the magnetic induction and electric field strength is incorrect, the direction of the magnetic and electric field strength can be changed by replacing the magnetic and electrical objects, or by changing their positions.

4.Finally, use a magnetometer or power meter to measure the direction of the magnetic induction intensity and the electric field strength again to ensure that they are correct. Personal Tips:

When checking the direction of magnetic induction intensity and electric field strength, it is important to ensure that the correct measuring instrument is used and that the accuracy of the measuring instrument is reliable. In addition, when replacing magnetic and electrical objects or changing their position, make sure that the performance of other circuits is not affected.

The direction of the magnetic field is the direction of the magnetic induction intensity, and the method of determining it is to put it in the direction of the magnetic field force on the small magnetic needle, which is also the direction when the small magnetic needle is stable and balanced.

Magnetic induction intensity (b).

1) Definition: The ratio of the magnetic field force F to the product of the current intensity i and the length of the wire L in the magnetic field of the energized wire perpendicular to the direction of the magnetic field in the magnetic field is called the magnetic induction intensity at the location of the energized wire, which is represented by B.

2) Formula: b=f (i·l).

3) Vector: The direction of b is the same as the direction of the magnetic field, that is, the direction of force at the n pole of the small magnetic needle.

4) Unit: Tesla (t) 1t = 1n (a·m), that is, a wire with a length of 1m placed in the direction of the perpendicular magnetic field, the incoming current is 1a, if the magnetic field force is 1n, then the magnetic induction intensity b at the place is 1t

Generally, the magnetic induction intensity near the poles of a permanent magnet is about; In the core of the motor and transformer, the magnetic induction intensity is about .

1) The direction of the magnetic inductance line reflects the direction of the magnetic inductance intensity, and the density of the magnetic inductance line reflects the magnitude of the magnetic inductance intensity.

2) The area where the magnitude and direction of the magnetic induction intensity are the same everywhere is called the uniform magnetic field. Its magnetic inductance lines are parallel and equidistant.

For example, the magnetic field inside a long energized solenoid and the magnetic field between two isonymous poles that are close to each other are uniform magnetic fields.

3) If b=f (i·l) is used to determine the magnetic induction intensity of a non-uniform magnetic field, the wire taken should be short enough to reflect the uniform intensity of the magnetic field at the position.

The physical quantities that represent the strength and direction of the magnetic field are:Magnetic induction intensity

Magnetic induction intensity refers to the physical quantity that describes the strength and direction of the magnetic field, which is a vector quantity, which is commonly represented by the name of the seller group and the international common unit is Tesla.

The symbol is t). Magnetic induction intensity is also known as magnetic flux density.

or magnetic flux density. In physics, the strength of a magnetic field is expressed in terms of the intensity of magnetic induction, and the greater the intensity of magnetic induction, the stronger the magnetic induction. The smaller the intensity of the magnetic induction, the weaker the magnetic induction.

Overview: There is a magnetic field around the current (moving charge), and its important external performance is: it has the effect of magnetic field force on the motion tentative charge, current-carrying conductor or permanent magnet introduced into the field, so the magnetic field can be used to describe the magnetic field by the effect of the magnetic field on the motion tentative charge, and thus the magnetic induction intensity b is introduced as the basic physical quantity to quantitatively describe the characteristics of each point in the magnetic field, and its position is the same as the electric field strength in the electric field.

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The reason why this physical quantity is called magnetic induction intensity, and it is called magnetic field strength.

Historically, the term magnetic field strength has been used to denote another physical quantity, the difference: the magnetic induction strength reflects the interaction force, which is the stress relationship between two reference points A and B, while the magnetic field strength is the unilateral quantity of the subject, regardless of whether the B side participates or not, this quantity is constant.

Definition: The electric field force experienced by an electric charge in an electric field.

is definite and the direction is the same or opposite to the direction of the electric field at that point. The magnetic field force exerted by the current somewhere in the magnetic field (ampere force, which is related to the direction in which the current is placed in the magnetic field, when the direction of the current is parallel to the direction of the magnetic field, the ampere force experienced by the current is the smallest, equal to zero; When the direction of the current is perpendicular to the direction of the magnetic field, the ampere force on the current is maximum.

The magnitude of the magnetic field strength and the current generated by the energized straight wire are related to the distance.

The formula for calculating the strength of the magnetic field is: h=n i le. where: h is the strength of the magnetic field, and the unit is a m; n is the number of turns of the excitation coil; i is the excitation current (measured value), unit bit a; LE is the effective magnetic circuit length of the test sample in m.

The strength of the magnetic field indicates the magnitude and direction of the carry-over and dissipation of the magnetic field. The strength of a magnetic field at a point in space can be measured by the force acting on a magnetic pole of known strength or the force on a current conductor of known intensity.