The physical heat is generated. A motor can work normally. The voltage at both ends of the motor is 380V, the coil resistance is 2 Ω, and the current through the coil is 10A. The electric energy consumed by the motor in normal operation for 1s is__ J. What is the heat generated by the coil resistance__ J Don't be too detailed, just a simple formula, Voltage at both ends of coil when a motor works normally

The physical heat is generated. A motor can work normally. The voltage at both ends of the motor is 380V, the coil resistance is 2 Ω, and the current through the coil is 10A. The electric energy consumed by the motor in normal operation for 1s is__ J. What is the heat generated by the coil resistance__ J Don't be too detailed, just a simple formula, Voltage at both ends of coil when a motor works normally


The electric energy of motor for 1s is p = UI = 380V * 10A = 3800j (power definition)
The heat generated by coil resistance is p '= I ^ 2 * r = 10 ^ 2 * 2 = 200J (Joule's law)



A motor is not a pure resistance, so its resistance can not be calculated by Ohm's law
Then u > IR can't calculate its resistance with Ohm's law
Is that right?


This is not right. If you are a junior high school student, you only need to know that the motor is a coil, and u = IR is a partial resistance Ohm's law, which can only be used in pure resistance circuits. If you are a senior high school student, you should know that when the coil in the motor generates mechanical energy, it can be compared with the coil in the transformer. In fact



Why electric motor and other non pure resistance circuit does not conform to Ohm's law?
Need a detailed reply
And what's the difference between w = uitq = I ^ 2T


Haha, it should be said that Ohm's law is only a special kind of resistance. This kind of resistance is proportional to the current and voltage, but not all the resistances meet this relationship
Especially for the motor, its internal rotation is realized by the force of the electrified conductor in the magnetic field. At this time, it is not only the resistance of the wire that blocks the current, but also the directional movement of the charge is hindered by the magnetic force, so it does not meet Ohm's law



Nonlinear components do not follow Ohm's law, but why can resistance be calculated by Ohm's law?


The instantaneous value of nonlinear components calculated by Ohm's law is not the average value, and the value at a certain moment still follows Ohm's law