If you have the primary and secondary coils of a transformer next to each other, then current will induce a voltage in the secondary coil, creating current flow. This question applies to motors as well. If I place a sheet of steel between the two coils, will I still induce a voltage? For example, say I have a steel pipe and inside the pipe I place a secondary coil of wire. Outside the pipe I place a primary coil. Can I induce a voltage in the secondary coil through the steel pipe?