The superconductivity problem is a power supply with a power supply with a low internal resistance o

It's actually simple. Look at it from the law of conservation of energy. Since both the power supply and conductor resistance are 0, there is certainly no heat loss.

Electric currents have 3 effects. Thermal, chemical, electromagnetic. No chemical reaction occurs in the conductor and the heat loss is 0

It depends on whether there is electromagnetic energy output. If the magnetic field generated by direct current is stable, it must be assumed that this magnetic field is completely isolated from other magnetic fields and does not interact. At this time, there is no energy released from the whole circuit, so the consumption is 0, and the resistance of the whole circuit is 0, so there is no end point, and the loop voltage is 0

So in this case, the power supply is not outputting a little energy.

The situation at this point is that the current is constantly flowing in the loop, like a circle, the current is constantly flowing, there is no voltage. There is no power loss.

To use another figurative analogy, the uniform circular motion of an object. Electrons are also substances that move in a uniform circular motion throughout the loop. The power supply does a work, which is the work done by the acceleration of the electron at the moment when the circuit is just turned on, as well as the electromagnetic energy emitted at that moment.

Other times the power supply is quite non-existent.

There is also the case where the power supply outputs either alternating current or pulsating DC. Then there will be electromagnetic waves to export energy to the outside world. At this time, due to the external output energy, the size of the output energy completely depends on the power of the power supply.

Another premise is that it must be a metal conductor so that there will be no chemical reaction.

The statement of this question is false.

First of all, there is no power supply with a physical internal resistance of 0. Whether it is a chemical power supply (battery), a physical power supply (generator) or an electronic power supply (linear, switching regulated power supply), it is only possible to achieve an internal resistance close to 0 within a certain current range. Of course, you can forcibly set the internal resistance of the power supply to 0, but this is already an ideal condition that is impossible to achieve, and can only be analyzed mathematically without application value.

Secondly, we talk about superconductor wires. There is no ideal superconductor wire in our world, and practical superconductors have a critical current value, and if the current intensity exceeds this value, it will lose its superconducting properties instantly. So your hypothesis can also not be analyzed for practical application, but only for mathematical analysis.

Finally, the resistance of all zeros is analyzed: since the resistance of the whole circuit is 0, and the line inductance is not considered, the entire power of the power supply will be used to accelerate the free electrons in the entire circuit. The speed of the electron will soon approach the speed of light, and its mass will increase at the same time; Until the end of the power supply is converted into the kinetic energy of free electrons – the result is a ring of electric current carrying a large current, and the electrons inside it maintain a speed close to the speed of light due to the lack of resistance (superconductors) until the end of the world.

Superconducting power supplies, superconducting electrical appliances, will not be converted into internal energy, all used to do external work. Ideal, but modern science is tackling the problem and many low-temperature superconductors have been discovered.

Joule's law calculates the electrical heat generated by the passage of electric current through resistance, and the Joule's law formula q=i 2rt is not defective in itself. The resistance is 0. What about resistance.

All scientific theories have their limitations. For example, Newton's classical theory of mechanics does not apply to high-speed particle motion. The questions you ask are indeed valuable, and I am afraid that few people can give you satisfactory answers.

This is because scientific theories should be summed up on the basis of a certain amount of practice, and there is no inference for experiments in this area at this stage. It is OK to make a conductor superconductive. However, it is very difficult for chemical batteries to become superconductive.

If it's a generator, according to what you said, I don't think it's about burning the power supply, but it's about not being able to drive such a generator to generate electricity. It's hard to say about chemical power.

It's hard to imagine, and it's hard for you to come up with it, and I'm afraid no one knows about it, but my personal guess is that there's going to be some kind of ray that has to be released, and it's okay to release it in the form of a ray.

The power supply is damaged. It is equivalent to connecting the positive and negative poles.

Nor can it be said absolutely.

Superconductors, also known as superconducting materials, refer to conductors with zero resistance at a certain temperature. In experiments, if the measured value of the conductor resistance is less than 10-25, the resistance can be considered to be zero.

Superconductors not only have zero resistance, but another important feature is that they are completely diamagnetic.

Superconductors were first discovered in 1911, when Dutch scientist Heiko Kamerin Onnes and others discovered that at extremely low temperatures, the resistance of mercury disappears and it becomes superconducting. Since then, the research on superconductors has been deepened, on the one hand, a variety of superconducting materials with practical potential have been discovered, and on the other hand, the research on superconductivity mechanism has also made some progress.

At present, superconductors have carried out a series of experimental applications, and have carried out certain military and commercial applications, and can be used as defective materials for photonic crystals in the field of communications.

For some special materials of Yanxun, when the temperature decreases to a certain level, the resistance value suddenly becomes zero, which is called superconductivity

So the answer is: 0 Qingxiang.

Superconductors have zero resistance at any temperature. Lead Hand Bridge (Potato Change).

a.That's right. b.Mistake.

Correct Huai Meng Answer: B

For some special materials of Yanxun, when the temperature decreases to a certain level, the resistance value suddenly becomes zero, which is called superconductivity

So the answer is: 0 Qingxiang.

Answer] :d

d [Analysis] The phenomenon of superconductivity refers to the fact that at absolute zero, the internal resistance of the material becomes zero, and the condition of absolute zero on the earth is extremely difficult to achieve, so this characteristic has not been applied in practice. Therefore, choose D.

The direction of the magnetic field passing through the ring is to the left, and the magnetic flux passing through the ring becomes larger as the magnet approaches the ring, and it can be seen from Lenz's law that the induced current in the ring looks clockwise from left to right;

Answer: The direction of the current is clockwise from left to right

If it is an ordinary conductor, will it disappear on its own?