How to calculate positive Joule heat with ampere force

1. 1. The essence of electromagnetic inction is the process of different forms of energy conversion. The process of generating and maintaining the existence of inced current is the process of converting other forms of energy into inced current energy. 2. The process of positive work done by Ampere force is the process of electric energy transforming into other forms of energy. The amount of positive work done by Ampere force is the amount of electric energy transforming into other forms of energy. 3. The process of Ampere force doing negative work is the process of converting other forms of energy into electric energy. How much work is done to overcome ampere force, how much other forms of energy will be converted into electric energy. 4. Before the conctor reaches a stable state, the work done by the external force to move the conctor is partly used to overcome the ampere force and convert it into electric energy to proce inced current or finally into Joule heat, and the other part is used to increase the kinetic energy of the conctor. 5. After the conctor reaches a stable state, the work done by the external force moving the conctor is all used to overcome the ampere force to do the work, which is converted into the electric energy procing the inced current and finally into Joule heat. Because ampere force appears in the form of resistance in electromagnetic inction. Therefore, the ampere force on the inced current always does negative work in the electromagnetic inction phenomenon. The positive work of Ampere force is the process of transforming electric energy into mechanical energy; When ampere force does negative work, it is the process of converting mechanical energy into electrical energy. From the perspective of energy conversion, electromagnetic inction is the conversion of mechanical energy into electrical energy.

2. The premise of Ampere force doing work = Joule heat is as follows:
1. Ampere force doing negative work (doing positive work is motor, electric energy is converted into mechanical energy)
2. There is only one electromotive force in the circuit, that is, inced electromotive force (no other power source participates in the energy process)
the mechanism of inced electromotive force is different from that of motional electromotive force, and its energy process is not completed by Ampere force, But the electromagnetic field is transmitting energy, that is to say, the electromagnetic wave is transmitting energy, and there is the energy flow of electromagnetic wave in the space of electromagnetic field distribution.
the typical transformer primary coil circuit and secondary coil circuit are two circuits, and the energy is transmitted from the primary coil to the secondary coil by the electromagnetic field in the transformer

3. It's not contradictory. You can imagine that if you just put the device flat on the ground and power on, the wire doesn't move and there is resistance. There is no ampere force, but Joule heat is proced. When you say that there is ampere force, Ampere force always acts as resistance. To be exact, Ampere's work is not equal to Joule heat. Don't dig into the corner. In middle school, there are many things for the convenience of memory. Generally speaking, you should also have the knowledge of primary school or junior high school. In high school, it's wrong. I can't give an example for you to understand

4. First of all, there is Joule heat in doing positive work. It's obvious that the process of life is everywhere. For example, your mobile phone will heat up, and the motor will heat up. It's just that middle school physics habit ignores doing positive work to heat up. When you learn efficiency later, what you lose is basically positive work Joule heat
secondly, you want to know the microscopic principle of Joule heat, which I think can explain. Whether the ampere force does positive or negative work, whether it is electromagnetism or electromagnetic inction, the common point lies in the generation of current, so what is the microscopic principle of current? Yes, it's electron transfer. Why does electron transfer generate heat? This mechanism is a little complicated, but we can also try to understand it. Electron transfer also rubs against microscopic particles. If it's in copper, it's equivalent to kangzhuang for electrons. The friction is much smaller. If it's in iron, the resistance may be larger, but electrons can still squeeze in. If it's in rubber, the friction is much smaller, The electron was so desperate that it couldn't squeeze in at all
therefore, in copper, the friction is small, and the electrons naturally generate less heat along the way, and the Joule heat is less. In iron, the friction is relatively large, and the heat is more, and the Joule heat is more. In rubber, the electrons can't get in at all, let alone Joule heat
you see, I even told you the micro explanation of resistance, so your wealth value is not that.. Divide me up..

5. Ampere force does positive work, and electrical energy is converted into thermal energy and mechanical energy. It's not equal to work done by Ampere force = Joule heat + mechanical energy

6. The process of overcoming ampere force to do work is the process of converting other forms of energy into electric energy. In the pure resistance circuit composed of resistance, electric energy is completely converted into Joule heat. Therefore, how much work is done to overcome the ampere force, how much other forms of energy are converted into Joule heat

7. When ampere force does negative work, it converts mechanical energy into heating. On the contrary, when ampere force does positive work, it converts all mechanical energy

8. With a clear conscience, the teacher's answer is correct. For your better understanding, I will explain again:

9. The amount of work done is a measure of energy conversion. When all the work done by Ampere force is converted into heat, they are equal

10. It is electromagnetic energy. The electrical problem in senior high school is the mutual conversion between electric field, magnetic field and gravity field