The discussion clarifies the distinction between induced electromotive force (emf) and back emf. Induced emf occurs when an open coil is exposed to a variable magnetic field, resulting in a potential difference across the coil. In contrast, back emf is generated when a coil connected to an emf source experiences a rising current, which creates a variable magnetic field that induces an opposing emf. Understanding these differences is crucial for applications in electrical engineering and circuit design.
PREREQUISITESElectrical engineers, physics students, and anyone interested in understanding the principles of electromagnetism and their applications in electrical circuits.
rl.bhat said:If an open coil is subjected to a variable magnetic field, at the ends of the coil a potential difference is induced which is called induced emf.
If a coil is connected to an emf source and switched on, the rising current will produced an variable magnetic field which in turn produces an emf. It is called back emf.