How to calculate the ampere force of induced electromotive force

1. Ampere force is the force of magnetic field on moving conctor. Now there is no moving conctor, of course there is no ampere force.
electromotive force is judged by Lenz's law

2.

The calculation formulas are as follows:

1,
{rrrrrrr}

extended data:

mechanism of inced electromotive force generation:

1. The changing magnetic field generates eddy electric field, which exerts a force on the free charge in the closed circuit and makes it move in a directional direction to form a current, The magnitude of the electromotive force is equal to the integral of the field strength of the eddy electric field along the closed loop

The inced electromotive force is generated by the change of magnetic field

reference source: network inced electromotive force

3. The calculation formula is:
1.
e = n δφ/δ T (universal formula) {Faraday's law of electromagnetic inction, e: inced electromotive force (V), N: number of turns of inction coil, δφ/δ t: The change rate of magnetic flux}

2.
e = BLV vertical (cutting magnetic inction line motion)
{L: effective length (m)}
< br />3.
em＝nbs ω The maximum inced electromotive force of alternator is
{em: peak value of inced electromotive force}
< br />4.
e＝bl2 ω/ 2 (one end of the conctor is fixed to ω Rotary cutting)
{ ω: Angular velocity (rad / s), V: velocity (M / s)}
< When the inced electromotive force is generated,
the conctor or conctor loop does not move, but the magnetic field changes. Therefore, Lorentz force cannot be the cause of inced electromotive force. The change of magnetic field proces the
rotational electric field, and the
force of the rotational electric field on the charge in the circuit is a kind of non electrostatic force, which causes the inced electromotive force, that is, the e-spin in the diagram is the
field strength of the rotational electric field, that is, the force of the rotational electric field on the unit positive charge.

4. 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

6. Inced electromotive force refers to the inced electromotive force in the conctor caused by the change of magnetic field, which is called inced electromotive force

ampere force: if there is an electrified wire in the magnetic field, because the current in the wire is formed by the directional movement of free moving electrons, when the electrons drift laterally under the action of Lorentz force, they collide with the positive ions on the lattice and transfer the force to the wire, so the electrified wire will be affected by the magnetic force in the magnetic field, which is the ampere force

since there is a collision, work will be done forcefully. Of course, heat will be generated inside the wire ~

many problems should be considered according to the concept~

7. Electric work: the work done by the current, how much work the current does, how much electric energy will be converted into other forms of energy
Electric Power: the work done by the current in unit time, which indicates the speed of the current's work
electromotive force: the power source's ability to convert other forms of energy into electric energy, It is equal to the work done by the non electrostatic force when the unit positive charge is transferred from the negative side of the power supply to the positive side through the inside of the power supply.

8. The second formula is the derivative integral of DL, 1 / 2dB / DTH and DL are independent of each other, so we directly refer to the outside of the integral

e sense = R / 2 * dB / dt? No, there's a cos. I don't remember the specific calculation formula. The first one is vector, the second one is scalar, which is decomposable

9. Write out the relationship between the magnetic flux and time, and then its negative derivative is