In electromagnetic conversion, the greater the current, the greater the electromagnetism?

First of all, it is necessary to distinguish between the induced current and the presence of a magnetic field around the energized conductor.

The rate of change is the rate of change of the magnetic flux, and the corresponding physical quantity is the induced electromotive force, which is proportional to the induced current. That is, the greater the rate of change of the magnetic flux, the greater the induced electromotive force and the greater the induced current. This is not the case in the subject question, excluding the rate of change.

In the physical phenomenon of the presence of a magnetic field around an energized conductor, the magnitude of the magnetic field is proportional to the magnitude of the current, and the corresponding formula is.

b refers to the intensity of the magnetic induction generated by the current at a certain point.

k is a constant (I don't know what it is called, and it is difficult to find it up, but it is related to Biosavall's law).

i. The magnitude of the current.

rThe distance from the point to the wire.

It can be seen that the higher the current, the greater the intensity of the magnetic induction excited at a certain point.

A magnetic field is generated around the energized wire, and the magnitude of the magnetic induction is proportional to the magnitude of the current.

The magnetic induction intensity increases uniformly, and according to Faraday's law of electromagnetic inductors, a constant current is generated by closing the coil.

The reason why the starting current of the motor is very large is: when it is just started, the slip rate s is the largest, and the rotor electromotive force e is also the largest, so the starting current is very large. There are two reasons why the starting torque is not large:

First, because the electromagnetic torque depends on the active component of the rotor winding current, when starting, s=1, the rotor leakage reactance is the largest, and the power factor on the rotor side is very low (left and right), therefore, the active component of the rotor winding current is very small when starting.

Second, the large starting current leads to the increase of the leakage impedance voltage drop of the stator winding, and if the power supply capacity is small, it will also lead to the decrease of the output voltage of the power supply, and the result is that the magnetic flux of each pole air gap decreases, and then causes the reduction of the starting torque.

So the starting current can reach 5 to 7 times the rated current. The starting torque can reach multiple times of the rated torque.

It depends on the situation, if the solenoid alone is energized, the greater the current, the greater the magnetism.

From Ampère's law, the magnetic field of the current b=k*i r shows that the electric field strength is proportional to the current passing through the coil, that is, the greater the current, the greater the magnetic field strength.

Magnetic flux = magnetic field strength * cross-sectional area. When the cross-sectional area is constant, the larger the current, the greater the magnetic field strength and the greater the magnetic flux. When the magnetic flux passing through the closed circuit changes, an induced current is generated, and the direction of the induced current is that the magnetic field generated by the induced current hinders the change of the original magnetic flux, and the greater the rate of change of the magnetic flux, the greater the induced current in the loop.

The magnitude of the magnetic flux passing through a certain plane can be vividly illustrated by the number of magnetic inductance lines passing through this plane. In the same magnetic field, where the greater the intensity of the magnetic induction, the denser the magnetic inductance lines. Therefore, the larger the b and the larger the s, the greater the magnetic flux, meaning the greater the number of magnetic lines passing through this surface.

If there are two magnetic fluxes in opposite directions across a plane, the resultant flux is the algebra of the opposite direction of the flux and the Hexagram (i.e., the remaining magnetic flux after the opposite resultant flux cancels out).

Gauss's theorem states that the magnetic flux through an arbitrarily closed surface is zero, i.e., it indicates that the magnetic field is passive, and there is no source or tail of the magnetic field lines that emit or converge, i.e., there is no isolated magnetic monopole. b in the above formula can be either the magnetic field produced by the electric current, or the magnetic field produced by the changing electric field, Zen, or the sum of both.

Magnetic flux density is the magnetic flux per unit area perpendicular to the direction of the magnetic field, which is equal to the magnitude b of the magnetic induction intensity of the magnetic field at that location. Magnetic flux density accurately describes the density of magnetic field lines.

The flux concept is a necessary means to describe the properties of the vector field, and the flux density describes the strength of the vector field. This is true for magnetic flux and magnetic flux density, both for electrical flux and electric flux density.

When the energized conductor is perpendicular to the direction of the magnetic field, the magnitude of its force is proportional to the length of the wire l, and also proportional to the current i in the wire, that is, it is proportional to the product of i and l il, the formula is f = ilb, where b is the magnetic induction intensity.

The greater the coil current, the greater the surrounding magnetic field – right. According to Ampere's law, the magnetic field of the current is b=k*i r, which means that the magnetic induction intensity of the magnetic field of the current is directly proportional to the current i and inversely proportional to the distance to the current.

First of all, it must be made clear that any magnetic field is reduced to a moving charge, such as the magnetic field of an electric current, which itself is formed by the directional movement of the charge; Permanent magnets are toroidal currents.

The effect of the magnetic field on the moving charge and the electric current is in accordance with the left-handed rule, which is clearly described in this textbook.

It is important to note that the magnetic field is generated by a moving charge, which in turn has a magnetic force on the moving charge placed in the field (divided into Lorentz force and ampere force), rather than on a charged conductor – a charged conductor is usually understood to be a conductor with an electrostatic charge that is not subjected to a magnetic field if it is stationary relative to the magnetic field.

Belch. Well--- in fact, magnetism is proportional to electric current!

Because magnetic flux is generated by electric current, and can only be generated by electric current, including permanent magnets, which are generated by molecular current. It has nothing to do with the magnitude of the voltage

From the formula for calculating the strength of the magnetic field: 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

All other things being equal, the strength of the magnetic field is proportional to the current, therefore.

For the same voltage, the greater the current, the stronger the energy, which is the law of electricity.

9**The relationship between the magnetic strength of the electromagnet and the magnitude of the current.

The magnetic flux is generated by the electric current, which does not mean that the magnetic flux of the widening voltage attacker is dependent on the current.

The reason is that the variable voltage resistor has a primary winding and a secondary winding, and in addition to the excitation current of the primary winding, the magnetic flux generated by most of the current and the magnetic flux generated by the secondary winding current cancel each other out of each other. Therefore, the magnetic flux of the transformer is determined by the excitation current.

The excitation current is proportional to the magnetic flux, which is proportional to the electromotive force induced by the primary winding (secondary winding).

e=m=e/(

Ignore the winding DC resistance, e u

The main magnetic flux of a transformer depends on the primary voltage, frequency, and number of turns of the primary winding.

For a fixed transformer, n1 is determined, and usually the frequency is also fixed (e.g. 50 Hz), then the main magnetic flux is determined by the primary voltage.

Because the electromagnetic increases, the smaller the resistance. There are mobile phones, computers, TVs next to the radio, **There will be electromagnetic interference during standby time.

What the hell is "the greater the electromagnetism"? In the field of electromagnetism, there has never been a saying or technical term for "the greater the electromagnetism".

Closed Circuit Basic Formula Current:i=v/r，Therefore, the current is proportional to the voltage when the resistance is constant; i=v/ r；

The most basic formula for the law of electromagnetic induction is:e=-n(dφ)/(dt)；

where: n is the number of turns of the coil;

is the change in magnetic flux, in wb;

t is the time taken to change, and the unit is s;

is the induced electromotive force generated, measured in v;

From the most basic formula of the law of electromagnetic induction:

e=-n(dφ)/(dt)，It can be seen that the magnetic flux tends to be 0 (not equal to 0), e tends to be maximum, and the closed circuit current tends to be maximum.

In fact, this is a very simple law of electromagnetic induction. If you move away from the magnetic field, the magnitude of the current should also increase.

When resisting leaving the magnetic field, the magnitude of the current of course changes, because the magnetic field affects the current.