EMF:
The three needs for inducing an EMF are:
1. A conductor,
2. A magnetic field, and
3. Relative motion between the two.
The faster the conductor moves, or the faster the magnetic field collapses or expands, the greater Coils the induced EMF. An induction could also be increased by coiling the wire in either Circuit A or Circuit B, or both, as display in next Figure.
Figure: Induced EMF in