What is the difference between an induced emf and a back emf?

[jayjay112]

What is the difference between an induced emf and a back emf?

(i) i thought they were the same thing??? . . .. .

 

[rl.bhat]

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.

 

[jayjay112]

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.

Thank you for clearing that up!!!!