why is there induced current in a dc motor?

[shirozack]

TL;DR Summary

why is there induced current in a dc motor?

why is the induced force in an ac generator not given by flemming's left hand rule but his right hand rule instead?

I just saw a question saying there's an induced current in a dc motor. i always thought dc motors' electromagnetism is separate from the ac generators' electromagnetic induction? if there's really an induced current, how will the overall system work then? wouldn't the rotation be opposed?

also, why does the force from an induced current not go in the direction of flemming's left hand rule but its right instead? what's the reason?

thanks

 

[Baluncore]

I just saw a question saying there's an induced current in a dc motor.

There is an induced voltage, proportional to RPM, called the back EMF.