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- Summary
- Should the rotor be considered as a magnet that experiences a torque based on the magnetic field it is surrounded by or as a circular wire which experience force = I x B which then produces a torque?

I've seen two different explanations on the working principle of DC motors:

One considers the rotor as a loop of wire that experiences a torque because current flow is perpendicular to an external magnetic field. The other describes the loop as an electromagnet which then experiences a torque due to the external magnet field.

Are both valid? And if so is the total force experienced by the wire the sum of the two or just one? It seems like double counting if both are counted.

One considers the rotor as a loop of wire that experiences a torque because current flow is perpendicular to an external magnetic field. The other describes the loop as an electromagnet which then experiences a torque due to the external magnet field.

Are both valid? And if so is the total force experienced by the wire the sum of the two or just one? It seems like double counting if both are counted.