Question

what's the difference between backward and forward induced emf and current????

Answer 1

A back emf arises in an inductance because of the rate of change of current.
Flux cutting the windings of an electric motor causes a back emf.
Polarisation in a primary cell causes a back emf.
Charging of a secondary cell causes a back emf.
A back emf opposes the 'forward' emf from a power source.

Answer 2

at the moment of inserting a magnet into a coil and at the moment of switching on the circuit or increasing the current......is that forward or backward???