Yes, but it would usually not have much practical use if the magnetic field flipped around all the time.
An electromagnet.
Possibly, you are thinking of Alternating Current?
increase the current on the electromagnet
He made it to test AC (alternating current). He watched as it made the electricity go wild. He had to understand how to control alternating current better.
That is an electromagnet.
Electromagnet.
Alternating current and static electricity. Pulses of current made via piezo electricity would be called d.c.
No, the electromagnet is not made weaker by making the core larger. It can be made weaker by decreasing its current and/or turns of coil.
The strength of a magnet(electromagnet) made by flowing electric current through a conducting coil depends on magnitude of current. . .
Nikola Tesla is known as the father of current. Tesla is made contributions to the modern alternating current of electricity.
Electromagnet.
All electric currents create magnetic fields. If you wind wire into a coil and pass current through the wire, that is an electromagnet.