Moving conductor in a magnetic would induce current in an electrical conductor. The generation of electrical current in a conductor by placing the conductor in a changing magnetic field is called induction, and an e.m.f. is induced, as shown in Figure 3.

Figure 3

The induced current can be increased by:

1. Moving the magnetic at a higher speed

2. Using stronger magnet

3. Increasing the number of turns in the coil

The equivalent of inductance connected in series:

L _{e q.} = L₁ + L₂ + L₃ + ………………….. (6-3)

The equivalent of inductance connected in parallel:

1/ L _{e q} = 1/ L₁ + 1/ L₂ + 1/ L₃ + ………. (6-4)