A coil with an iron core is called an electromagnet. The iron core increases the coil’s magnetic field strength. A simple electromagnet is made by coiling wire around an iron nail. An iron core ...

The first circuit is used to switch on the second one. The first circuit is a simple electromagnet in series with a battery or cell and a switch. When the switch is turned on current flows and the ...

The film explains the concept of electromagnetic waves, particularly focusing on their applications in radar, radio, and television. It describes how a crystal set functions as a simple radio ...

Electromagnets are found in many applications ... Note: Although this procedure is relatively simple, it can have its difficulties. If you're having trouble, try adding a second battery, using ...

Perhaps unsurprisingly given the prevalence and cost of these devices, the answer is quite simple. The key interaction is between a permanent magnet mounted to the end of the waving arm/pendulum ...

The one that [Made in Poland] chose to sacrifice was particularly nasty and greasy, but after popping off the pulley, the treasure within was revealed: the large, ring-shaped clutch electromagnet.