A magnetic induction assembly includes a magnetic core, a primary winding, a secondary winding and a base. The primary winding is wound by a wire. The secondary winding is a conductive plate having an open loop and two contact ends. The base has a body having a through hollow. A surface of the body is formed with n partitions, where n is greater than or equal to 1. The partitions divide the body into n+1 winding areas for being selectively wound by the wire. Each of the partitions has a chamber, a through hole communicating with the through hollow and an opening allowing the secondary winding to enter the chamber. The magnetic core passes through the through hollow, the through holes and the loop of the conductive plate to magnetically couple with the primary winding and the secondary winding.