How Do You Make An Electromagnet From Transformer Coils?
As discussed in “Fundamentals of Physics,” by David Halliday and Robert Resnick, transformers transfer electrical energy from a primary circuit to a secondary circuit. The energy from the primary circuit manifests as alternating current (AC). This current runs through a wire coil on the transformer. The coil produces a magnetic field which magnetizes the transformer. The AC varies; therefore, so does the magnetization of the transformer. This magnetic variation creates an electromotive force (emf) in a coil in the secondary circuit. You can make a transformer into an electromagnet by removing the secondary circuit’s wire coil from the transformer. Cut the secondary coil off the transformer. Just cut it with wire cutters and unwind it. Remove a portion of the transformer’s magnetizable material, if it forms a closed loop–specifically, the portion that held the secondary coil. Cutting the loop provides two ends, creating the north and south poles required for your electromagnet. If inst
