Cornell is tough. Even tougher for engineering students. There will be days you feel like your the stupidest kid in the program, and you'll wonder if you belong with everyone else. But then you remember that your experience at Cornell shouldn't be shaped by your performance relative to everyone else. Rather, your experience there should be shaped by how much you've saturated yourself in the learning environment. There is no better place to expose yourself to all sorts of knowledge than Cornell.
Back-EMF Motion Feedback. INTRODUCTION. Electromotive force (EMF) refers to the voltage generated by a spinning motor. Measuring this voltage in order to determine the rotational speed of a motor is commonly called Back-EMF since the voltage tends to push-back against the circuit driving current into a motor's windings.
#3. dazza95. EMF refers to voltage generated by a battery or by the magnetic force according to Faraday's Law, which states that a time varying magnetic field will induce an electric current. Electromotive force is not a force (measured in newtons) but a potential, or energy per unit of charge, measured in volts. Formally, emf is the external work expended per unit of charge to produce an electric potential difference across two open-circuited terminals.