Regarding the question of Lenz s law, how is Lenz s law understood?

The magnetic flux is constant at that moment, it is no current, just like the generator coil, when the coil plane is perpendicular to the magnetic inductance line, there is no current at that moment. Draw that image and you'll understand. Option C has the largest magnetic flux and the smallest when it changes, which is zero...

Maybe you have overlooked a problem, when the magnet is in the circle, the magnetic flux is not just looking at the magnetic inductance lines outside the magnet, the calculation of the magnetic flux is to use the inside of the magnet minus the outside, because the direction is opposite, the inside of the magnet is the magnetic inductance line and is the densest.

Ordinary conductors produce an electric current and then disappear because there is resistance that produces heat, but superconductors don't -- it stores current, and at that moment it's all superimposed, and of course it's maximum, and it's the opposite direction of the current backwards, which reduces its current. Isn't it wrong with me? Give me a share ...

If you don't understand, I'll explain it to you.

I'm copying someone else! See references

There should simply be an electric current generated, creating a magnetic field that changes in the opposite direction, and then hindering the change in magnetic flux.

Lenz's law can be summed up as follows: "The effect of inducing an electric current always rebels against the cause of it." If the induced current in a loop is caused by a change in the magnetic flux passing through the loop, then Lenz's law can be specifically formulated as:

The magnetic flux generated by the induced current in the loop always resists (or hinders) the change of the original magnetic flux. ”

This expression is generally referred to as the flux expression, where the "effect" of the induced current is the generation of magnetic flux in the loop; The cause of the induced current is the "change in the original magnetic flux".

You can use twelve words to vividly remember "increase and subtract the same, to block and stay, increase and decrease and expand". If the induced current is generated by the motion of the conductor that makes up the loop to cut the magnetic inductance line, then Lenz's law can be specifically expressed as: "The magnetic field force (ampere force) of the induced current on the moving conductor always resists (or hinders) the movement of the conductor."

This expression can also be called a force expression, where the "effect" of the induced current is the force of a magnetic field; The "cause" of the induced current is the movement of the conductor to cut the magnetic inductance line.

From the above expression of Lenz's law, it can be seen that Lenz's law does not directly point out the direction of the induced current, but only summarizes the principle of determining the direction of the induced current and gives the procedure for determining the induced current. To truly grasp it, it is necessary to have a correct understanding of the meaning of the expression, and to be proficient in the magnetic field of the current and the law of the force of the current in the magnetic field.

In the case of "flux expression", the main point is that the magnetic flux of the induced current resists the change of the original magnetic flux of the induced current, not the original magnetic flux. If the original magnetic flux is increasing, then the magnetic flux of the induced current must be in the opposite direction of the original magnetic flux if it is to resist the increase of the original magnetic flux; If the original magnetic flux decreases, then the magnetic flux of the induced current must be in the same direction as the original magnetic flux in order to resist the decrease of the original magnetic flux.

Lenz's law is mainly to determine the direction of induced current or induced electromotive force, which is the basis and premise of Faraday's law of electromagnetic induction. Faraday's law of electromagnetic induction studies the magnitude of the induced electromotive force, and if the resistance is known, the magnitude of the induced current can be known. The formulation of Lenz's law boils down to:

The effect of induced current always rebels against the cause of it.

If the induced current in the loop is caused by a change in the magnetic flux passing through the loop, then Lenz's law can be specifically stated as follows: The magnetic flux generated by the induced current in the loop always resists (or hinders) the change in the original magnetic flux through the silver. The cause of the induced current is the change in the original magnetic flux.

You can use twelve words to image the memory of increasing and subtracting the same, refusing to stay, increasing and decreasing.

Lenz's law: The induced current has such a direction that the magnetic field of the induced current always hinders the change in the magnetic flux that causes the induced current.

Lenz's law is a general rule for judging the direction of induced currents.

Right hand rule: Stretch out the right hand, so that the thumb and four fingers are in the same plane and perpendicular to the four fingers, so that the magnetic inductance line perpendicularly penetrates the palm of the hand, so that the thumb points to the direction of the conductor movement, and the direction of the four fingers is the direction of the induced current.

The right-hand rule is only suitable for judging the movement of some conductors in a closed circuit to cut magnetic inductance lines.

The right-hand rule determines that the direction of the induced current is consistent with Lenz's law, but it is simpler than Lenz's law.

Left-handed rule (Ampere's rule): Knowing the direction of the current and the direction of the magnetic inductance line, the direction of the force on the energized conductor in the magnetic field is determined. Stretch out your left hand, let the magnetic line pass through the palm of your hand (palm aligned with the n pole, the back of the hand with the S pole), and the four fingers point to the direction of the current, then the direction of the thumb is the direction of the conductor force.

As for how to use it, "left movement and right hair" means that the left hand "motor" and the right hand "generator".

The left-handed rule says that the magnetic field exerts the force on an electric current, or the magnetic field on a moving charge. That's the key.

The phenomenon applied by the right-hand rule is the direction of movement of the induced current generated by the wire when the wire is cut in the magnetic field and the magnetic inductance line moves. For example, the direction of the magnetic field, the movement of the cutting magnetic inductance lines, and the direction of the electromotive force are all related to the induced current. Use the right-hand rule.

Lenz's law: the flow direction of the induced current in the closed conductor loop always attempts to make the magnetic flux of the induced current large and self-excited through the area of the loop, which can cancel or compensate for the increase or decrease in the amount of magnetic flux masking that causes the induced current.

That is, the flow direction of the induced current in the loop always makes the magnetic flux excited by the induced current through the loop, and hinders the change of the original magnetic flux in the loop.

The content of the law of stunned times: the induced current has a direction such that the magnetic field of the induced current always hinders the change of the magnetic flux that causes the induced current.

The steps of the basic law of frenzy are shown in the following way.

Determine the direction of the magnetic field that causes the early state current of the induced sail.

Determine the change in the original magnetic flux. (increase or decrease).

Determines the direction of the magnetic field of the induced current. (The direction of the two magnetic fields is opposite when increasing time, and the direction of the two magnetic fields is opposite when decreasing) is judged by the state source. (Ampere's rule, i.e., right-handed spiral tube rule).

What is the content of the Lengci code Fu Ding Chi Jing with the lead of the law.

Lenz's law: The flow direction of the induced current in a closed conductor loop is always to make the magnetic flux through the area of the loop that the induced current excite itself, which can cancel out or compensate for the increase or decrease in the magnetic flux that causes the induced current.

In other words, the flow direction of the induced current in the loop always makes the magnetic flux excited by the induced current through the circuit resist the change of the original magnetic flux in the loop.

Lenz's law is a law of electromagnetism that derives the direction of the induced electromotive force from electromagnetic induction.

The magnetic field of the induced current always has to hinder the change in the magnetic flux that causes the induced current.

Note: "Hinder" is not "opposite", the direction is opposite when the original magnetic flux increases, and the direction is the same when the original magnetic flux decreases; "Obstruction" is not a block, the magnetic flux in the circuit still changes.

Lenz's law" can be generalized as:

Hinders changes in the original magnetic flux.

Obstruction of relative motion (of a conductor) (a condition in which an induced current is caused by the movement of a conductor relative to a magnetic field). It can be understood as "those who come refuse, and those who go stay".

What is the content of Lenz's law.

The magnetic flux "change" through the coil n to produce the induced current.

Explanation: Why accelerate??

This is because if the wire AB moves at a constant speed, the induced current generated is constant (i = BLV).

The magnetic field generated in coil m is also constant.

In this case, the magnetic flux passing through the small coil n is constant and does not change, and the small coil n does not induce current.

So, if you want to accelerate, the (counterclockwise) current through the coil m will increase continuously.

i = blv, v increases, i increases).

It is the magnetic field that passes through the coil n that is constantly increasing.

In this way, the magnetic flux through the coil n is constantly increasing. According to Lenz's law, coil n has to generate an induced magnetic field to prevent the magnetic field passing through it from getting stronger.

That is, the magnetic field generated by the N-coil is "reversed" to the magnetic field of the M-coil (perpendicular to the paper face inward).

With a right hand grip, the induced current generated by the n-coil is in a "clockwise" direction.

Explanation: Why the slowdown?

With the previous explanation. This can be simpler.

If you decelerate to the right, the (clockwise) current through the coil m decreases.

i = blv, v decreases, i decreases).

It is the magnetic field that passes through the coil n that is constantly weakening.

In this way, the magnetic flux through the coil n is constantly decreasing. According to Lenz's law: the coil n has to generate an induced magnetic field to prevent the magnetic field passing through it from weakening.

That is, the magnetic field generated by the N-coil should be "in the same direction" as the magnetic field of the M-coil. (Vertical paper facing inward).

With the right hand, the induced current generated by the n-coil is also in a "clockwise" direction.

Supplement: according to Lenz's law:

You increase ??? If you don't get bigger, I'm going to hinder you!! (Hindering it is the opposite of it) You reduce ??? Don't let you shrink, I'm going to help you!! To help it is to go in the same direction as it).